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Finding the Fourth Proportional to 638,612.88, 881,266.88 and 352,132.88

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Solution

The fourth proportional to 638,612.88, 881,266.88 and 352,132.88 is: 485,932.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,612.88 : 881,266.88 = 352,132.88 : x
  2. Step 2: Convert to fraction form
    638,612.88/881,266.88 = 352,132.88/x
  3. Step 3: Cross multiply
    638,612.88x = 881,266.88 × 352,132.88
  4. Step 4: Simplify right side
    638,612.88x = 310,323,044,503.01
  5. Step 5: Solve for x
    x = 310,323,044,503.01/638,612.88
  6. Step 6: Final answer
    x = 485,932.96

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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.