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Finding the Fourth Proportional to 642,469.72, 886,584.30 and 370,549

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Solution

The fourth proportional to 642,469.72, 886,584.30 and 370,549 is: 511,343.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,469.72 : 886,584.30 = 370,549 : x
  2. Step 2: Convert to fraction form
    642,469.72/886,584.30 = 370,549/x
  3. Step 3: Cross multiply
    642,469.72x = 886,584.30 × 370,549
  4. Step 4: Simplify right side
    642,469.72x = 328,522,925,780.70
  5. Step 5: Solve for x
    x = 328,522,925,780.70/642,469.72
  6. Step 6: Final answer
    x = 511,343.83

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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.