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Finding the Fourth Proportional to 709,765.15, 979,490.73 and 387,488.83

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Solution

The fourth proportional to 709,765.15, 979,490.73 and 387,488.83 is: 534,742.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,765.15 : 979,490.73 = 387,488.83 : x
  2. Step 2: Convert to fraction form
    709,765.15/979,490.73 = 387,488.83/x
  3. Step 3: Cross multiply
    709,765.15x = 979,490.73 × 387,488.83
  4. Step 4: Simplify right side
    709,765.15x = 379,541,716,963.55
  5. Step 5: Solve for x
    x = 379,541,716,963.55/709,765.15
  6. Step 6: Final answer
    x = 534,742.68

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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.