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Finding the Fourth Proportional to 520,279.70, 779,901.15 and 239,306.90

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Solution

The fourth proportional to 520,279.70, 779,901.15 and 239,306.90 is: 358,721.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,279.70 : 779,901.15 = 239,306.90 : x
  2. Step 2: Convert to fraction form
    520,279.70/779,901.15 = 239,306.90/x
  3. Step 3: Cross multiply
    520,279.70x = 779,901.15 × 239,306.90
  4. Step 4: Simplify right side
    520,279.70x = 186,635,726,512.94
  5. Step 5: Solve for x
    x = 186,635,726,512.94/520,279.70
  6. Step 6: Final answer
    x = 358,721.91

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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.