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Finding the Fourth Proportional to 639,911.50, 883,002.33 and 353,414.50

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Solution

The fourth proportional to 639,911.50, 883,002.33 and 353,414.50 is: 487,670.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,911.50 : 883,002.33 = 353,414.50 : x
  2. Step 2: Convert to fraction form
    639,911.50/883,002.33 = 353,414.50/x
  3. Step 3: Cross multiply
    639,911.50x = 883,002.33 × 353,414.50
  4. Step 4: Simplify right side
    639,911.50x = 312,065,824,748.28
  5. Step 5: Solve for x
    x = 312,065,824,748.28/639,911.50
  6. Step 6: Final answer
    x = 487,670.29

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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.