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Finding the Fourth Proportional to 382,679.22, 574,068.95 and 126,426.61

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Solution

The fourth proportional to 382,679.22, 574,068.95 and 126,426.61 is: 189,656.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,679.22 : 574,068.95 = 126,426.61 : x
  2. Step 2: Convert to fraction form
    382,679.22/574,068.95 = 126,426.61/x
  3. Step 3: Cross multiply
    382,679.22x = 574,068.95 × 126,426.61
  4. Step 4: Simplify right side
    382,679.22x = 72,577,591,254.76
  5. Step 5: Solve for x
    x = 72,577,591,254.76/382,679.22
  6. Step 6: Final answer
    x = 189,656.47

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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.