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Finding the Fourth Proportional to 639,489.43, 882,497.53 and 353,008.83

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Solution

The fourth proportional to 639,489.43, 882,497.53 and 353,008.83 is: 487,153.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,489.43 : 882,497.53 = 353,008.83 : x
  2. Step 2: Convert to fraction form
    639,489.43/882,497.53 = 353,008.83/x
  3. Step 3: Cross multiply
    639,489.43x = 882,497.53 × 353,008.83
  4. Step 4: Simplify right side
    639,489.43x = 311,529,420,543.19
  5. Step 5: Solve for x
    x = 311,529,420,543.19/639,489.43
  6. Step 6: Final answer
    x = 487,153.35

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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.