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Finding the Fourth Proportional to 663,974.76, 916,223.34 and 377,438.76

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Solution

The fourth proportional to 663,974.76, 916,223.34 and 377,438.76 is: 520,830.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,974.76 : 916,223.34 = 377,438.76 : x
  2. Step 2: Convert to fraction form
    663,974.76/916,223.34 = 377,438.76/x
  3. Step 3: Cross multiply
    663,974.76x = 916,223.34 × 377,438.76
  4. Step 4: Simplify right side
    663,974.76x = 345,818,201,332.66
  5. Step 5: Solve for x
    x = 345,818,201,332.66/663,974.76
  6. Step 6: Final answer
    x = 520,830.34

Related Problems

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Half scale
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Double scale
Find fourth proportional to 663,975.76, 916,224.72 and 377,439.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.