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Finding the Fourth Proportional to 642,816.88, 887,027.66 and 356,312.59

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Solution

The fourth proportional to 642,816.88, 887,027.66 and 356,312.59 is: 491,678.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,816.88 : 887,027.66 = 356,312.59 : x
  2. Step 2: Convert to fraction form
    642,816.88/887,027.66 = 356,312.59/x
  3. Step 3: Cross multiply
    642,816.88x = 887,027.66 × 356,312.59
  4. Step 4: Simplify right side
    642,816.88x = 316,059,120,273.28
  5. Step 5: Solve for x
    x = 316,059,120,273.28/642,816.88
  6. Step 6: Final answer
    x = 491,678.32

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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.