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Finding the Fourth Proportional to 642,880.29, 887,196.38 and 356,383.29

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Solution

The fourth proportional to 642,880.29, 887,196.38 and 356,383.29 is: 491,820.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,880.29 : 887,196.38 = 356,383.29 : x
  2. Step 2: Convert to fraction form
    642,880.29/887,196.38 = 356,383.29/x
  3. Step 3: Cross multiply
    642,880.29x = 887,196.38 × 356,383.29
  4. Step 4: Simplify right side
    642,880.29x = 316,181,964,780.49
  5. Step 5: Solve for x
    x = 316,181,964,780.49/642,880.29
  6. Step 6: Final answer
    x = 491,820.90

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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.