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Finding the Fourth Proportional to 639,885.30, 883,036.53 and 353,425.02

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Solution

The fourth proportional to 639,885.30, 883,036.53 and 353,425.02 is: 487,723.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,885.30 : 883,036.53 = 353,425.02 : x
  2. Step 2: Convert to fraction form
    639,885.30/883,036.53 = 353,425.02/x
  3. Step 3: Cross multiply
    639,885.30x = 883,036.53 × 353,425.02
  4. Step 4: Simplify right side
    639,885.30x = 312,087,203,275.98
  5. Step 5: Solve for x
    x = 312,087,203,275.98/639,885.30
  6. Step 6: Final answer
    x = 487,723.66

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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.