Home / 642,765.60-887,080.14-356,341.05

Finding the Fourth Proportional to 642,765.60, 887,080.14 and 356,341.05

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Solution

The fourth proportional to 642,765.60, 887,080.14 and 356,341.05 is: 491,785.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,765.60 : 887,080.14 = 356,341.05 : x
  2. Step 2: Convert to fraction form
    642,765.60/887,080.14 = 356,341.05/x
  3. Step 3: Cross multiply
    642,765.60x = 887,080.14 × 356,341.05
  4. Step 4: Simplify right side
    642,765.60x = 316,103,068,521.75
  5. Step 5: Solve for x
    x = 316,103,068,521.75/642,765.60
  6. Step 6: Final answer
    x = 491,785.91

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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.