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Finding the Fourth Proportional to 643,354.95, 887,936.28 and 356,967.30

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Solution

The fourth proportional to 643,354.95, 887,936.28 and 356,967.30 is: 492,673.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,354.95 : 887,936.28 = 356,967.30 : x
  2. Step 2: Convert to fraction form
    643,354.95/887,936.28 = 356,967.30/x
  3. Step 3: Cross multiply
    643,354.95x = 887,936.28 × 356,967.30
  4. Step 4: Simplify right side
    643,354.95x = 316,964,218,434.78
  5. Step 5: Solve for x
    x = 316,964,218,434.78/643,354.95
  6. Step 6: Final answer
    x = 492,673.94

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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.