Home / 643,142.46-887,538.64-356,689.02

Finding the Fourth Proportional to 643,142.46, 887,538.64 and 356,689.02

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Solution

The fourth proportional to 643,142.46, 887,538.64 and 356,689.02 is: 492,231.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,142.46 : 887,538.64 = 356,689.02 : x
  2. Step 2: Convert to fraction form
    643,142.46/887,538.64 = 356,689.02/x
  3. Step 3: Cross multiply
    643,142.46x = 887,538.64 × 356,689.02
  4. Step 4: Simplify right side
    643,142.46x = 316,575,287,713.73
  5. Step 5: Solve for x
    x = 316,575,287,713.73/643,142.46
  6. Step 6: Final answer
    x = 492,231.98

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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.