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Finding the Fourth Proportional to 709,790.56, 979,495.12 and 387,488.16

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Solution

The fourth proportional to 709,790.56, 979,495.12 and 387,488.16 is: 534,725.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,790.56 : 979,495.12 = 387,488.16 : x
  2. Step 2: Convert to fraction form
    709,790.56/979,495.12 = 387,488.16/x
  3. Step 3: Cross multiply
    709,790.56x = 979,495.12 × 387,488.16
  4. Step 4: Simplify right side
    709,790.56x = 379,542,761,777.78
  5. Step 5: Solve for x
    x = 379,542,761,777.78/709,790.56
  6. Step 6: Final answer
    x = 534,725.01

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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.