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Finding the Fourth Proportional to 424,139.40, 636,014.70 and 187,360.20

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Solution

The fourth proportional to 424,139.40, 636,014.70 and 187,360.20 is: 280,954.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,139.40 : 636,014.70 = 187,360.20 : x
  2. Step 2: Convert to fraction form
    424,139.40/636,014.70 = 187,360.20/x
  3. Step 3: Cross multiply
    424,139.40x = 636,014.70 × 187,360.20
  4. Step 4: Simplify right side
    424,139.40x = 119,163,841,394.94
  5. Step 5: Solve for x
    x = 119,163,841,394.94/424,139.40
  6. Step 6: Final answer
    x = 280,954.43

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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.