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Finding the Fourth Proportional to 709,471.98, 979,092.07 and 387,202.76

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Solution

The fourth proportional to 709,471.98, 979,092.07 and 387,202.76 is: 534,351.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,471.98 : 979,092.07 = 387,202.76 : x
  2. Step 2: Convert to fraction form
    709,471.98/979,092.07 = 387,202.76/x
  3. Step 3: Cross multiply
    709,471.98x = 979,092.07 × 387,202.76
  4. Step 4: Simplify right side
    709,471.98x = 379,107,151,798.11
  5. Step 5: Solve for x
    x = 379,107,151,798.11/709,471.98
  6. Step 6: Final answer
    x = 534,351.13

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Half scale
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Double scale
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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.