Home / 661,257.17-911,690.20-428,272.55

Finding the Fourth Proportional to 661,257.17, 911,690.20 and 428,272.55

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Solution

The fourth proportional to 661,257.17, 911,690.20 and 428,272.55 is: 590,469.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,257.17 : 911,690.20 = 428,272.55 : x
  2. Step 2: Convert to fraction form
    661,257.17/911,690.20 = 428,272.55/x
  3. Step 3: Cross multiply
    661,257.17x = 911,690.20 × 428,272.55
  4. Step 4: Simplify right side
    661,257.17x = 390,451,886,764.01
  5. Step 5: Solve for x
    x = 390,451,886,764.01/661,257.17
  6. Step 6: Final answer
    x = 590,469.04

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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.