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Finding the Fourth Proportional to 487,910.85, 731,374.20 and 221,862.30

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Solution

The fourth proportional to 487,910.85, 731,374.20 and 221,862.30 is: 332,569.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,910.85 : 731,374.20 = 221,862.30 : x
  2. Step 2: Convert to fraction form
    487,910.85/731,374.20 = 221,862.30/x
  3. Step 3: Cross multiply
    487,910.85x = 731,374.20 × 221,862.30
  4. Step 4: Simplify right side
    487,910.85x = 162,264,362,172.66
  5. Step 5: Solve for x
    x = 162,264,362,172.66/487,910.85
  6. Step 6: Final answer
    x = 332,569.69

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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.