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Finding the Fourth Proportional to 625,428.80, 938,143.20 and 251,259.20

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Solution

The fourth proportional to 625,428.80, 938,143.20 and 251,259.20 is: 376,888.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,428.80 : 938,143.20 = 251,259.20 : x
  2. Step 2: Convert to fraction form
    625,428.80/938,143.20 = 251,259.20/x
  3. Step 3: Cross multiply
    625,428.80x = 938,143.20 × 251,259.20
  4. Step 4: Simplify right side
    625,428.80x = 235,717,109,917.44
  5. Step 5: Solve for x
    x = 235,717,109,917.44/625,428.80
  6. Step 6: Final answer
    x = 376,888.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.