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Finding the Fourth Proportional to 663,647.72, 915,911.60 and 377,210.85

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Solution

The fourth proportional to 663,647.72, 915,911.60 and 377,210.85 is: 520,595.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,647.72 : 915,911.60 = 377,210.85 : x
  2. Step 2: Convert to fraction form
    663,647.72/915,911.60 = 377,210.85/x
  3. Step 3: Cross multiply
    663,647.72x = 915,911.60 × 377,210.85
  4. Step 4: Simplify right side
    663,647.72x = 345,491,791,274.81
  5. Step 5: Solve for x
    x = 345,491,791,274.81/663,647.72
  6. Step 6: Final answer
    x = 520,595.16

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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.