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Finding the Fourth Proportional to 642,343.60, 886,432.44 and 355,863.88

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Solution

The fourth proportional to 642,343.60, 886,432.44 and 355,863.88 is: 491,091.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,343.60 : 886,432.44 = 355,863.88 : x
  2. Step 2: Convert to fraction form
    642,343.60/886,432.44 = 355,863.88/x
  3. Step 3: Cross multiply
    642,343.60x = 886,432.44 × 355,863.88
  4. Step 4: Simplify right side
    642,343.60x = 315,449,287,456.27
  5. Step 5: Solve for x
    x = 315,449,287,456.27/642,343.60
  6. Step 6: Final answer
    x = 491,091.20

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1.5x scale

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.