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Finding the Fourth Proportional to 639,889.80, 883,029.76 and 353,403.73

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Solution

The fourth proportional to 639,889.80, 883,029.76 and 353,403.73 is: 487,687.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,889.80 : 883,029.76 = 353,403.73 : x
  2. Step 2: Convert to fraction form
    639,889.80/883,029.76 = 353,403.73/x
  3. Step 3: Cross multiply
    639,889.80x = 883,029.76 × 353,403.73
  4. Step 4: Simplify right side
    639,889.80x = 312,066,010,885.01
  5. Step 5: Solve for x
    x = 312,066,010,885.01/639,889.80
  6. Step 6: Final answer
    x = 487,687.12

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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.