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Finding the Fourth Proportional to 709,371.90, 978,925.05 and 387,087.30

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Solution

The fourth proportional to 709,371.90, 978,925.05 and 387,087.30 is: 534,176.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,371.90 : 978,925.05 = 387,087.30 : x
  2. Step 2: Convert to fraction form
    709,371.90/978,925.05 = 387,087.30/x
  3. Step 3: Cross multiply
    709,371.90x = 978,925.05 × 387,087.30
  4. Step 4: Simplify right side
    709,371.90x = 378,929,454,506.87
  5. Step 5: Solve for x
    x = 378,929,454,506.87/709,371.90
  6. Step 6: Final answer
    x = 534,176.01

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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.