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Finding the Fourth Proportional to 709,767.15, 979,493.49 and 387,490.83

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Solution

The fourth proportional to 709,767.15, 979,493.49 and 387,490.83 is: 534,745.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,767.15 : 979,493.49 = 387,490.83 : x
  2. Step 2: Convert to fraction form
    709,767.15/979,493.49 = 387,490.83/x
  3. Step 3: Cross multiply
    709,767.15x = 979,493.49 × 387,490.83
  4. Step 4: Simplify right side
    709,767.15x = 379,544,745,419.70
  5. Step 5: Solve for x
    x = 379,544,745,419.70/709,767.15
  6. Step 6: Final answer
    x = 534,745.44

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Double scale
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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.