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Finding the Fourth Proportional to 709,689.76, 979,337.73 and 403,737.40

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Solution

The fourth proportional to 709,689.76, 979,337.73 and 403,737.40 is: 557,138.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,689.76 : 979,337.73 = 403,737.40 : x
  2. Step 2: Convert to fraction form
    709,689.76/979,337.73 = 403,737.40/x
  3. Step 3: Cross multiply
    709,689.76x = 979,337.73 × 403,737.40
  4. Step 4: Simplify right side
    709,689.76x = 395,395,268,832.10
  5. Step 5: Solve for x
    x = 395,395,268,832.10/709,689.76
  6. Step 6: Final answer
    x = 557,138.19

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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.