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Finding the Fourth Proportional to 665,391.81, 998,373.65 and 216,250.32

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Solution

The fourth proportional to 665,391.81, 998,373.65 and 216,250.32 is: 324,468.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,391.81 : 998,373.65 = 216,250.32 : x
  2. Step 2: Convert to fraction form
    665,391.81/998,373.65 = 216,250.32/x
  3. Step 3: Cross multiply
    665,391.81x = 998,373.65 × 216,250.32
  4. Step 4: Simplify right side
    665,391.81x = 215,898,620,210.82
  5. Step 5: Solve for x
    x = 215,898,620,210.82/665,391.81
  6. Step 6: Final answer
    x = 324,468.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.