Home / 285,187.20-428,414.40-238,531.20

Finding the Fourth Proportional to 285,187.20, 428,414.40 and 238,531.20

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Solution

The fourth proportional to 285,187.20, 428,414.40 and 238,531.20 is: 358,326.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,187.20 : 428,414.40 = 238,531.20 : x
  2. Step 2: Convert to fraction form
    285,187.20/428,414.40 = 238,531.20/x
  3. Step 3: Cross multiply
    285,187.20x = 428,414.40 × 238,531.20
  4. Step 4: Simplify right side
    285,187.20x = 102,190,200,929.28
  5. Step 5: Solve for x
    x = 102,190,200,929.28/285,187.20
  6. Step 6: Final answer
    x = 358,326.74

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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.