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Finding the Fourth Proportional to 639,065.04, 881,279.76 and 495,772.80

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Solution

The fourth proportional to 639,065.04, 881,279.76 and 495,772.80 is: 683,677.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,065.04 : 881,279.76 = 495,772.80 : x
  2. Step 2: Convert to fraction form
    639,065.04/881,279.76 = 495,772.80/x
  3. Step 3: Cross multiply
    639,065.04x = 881,279.76 × 495,772.80
  4. Step 4: Simplify right side
    639,065.04x = 436,914,534,198.53
  5. Step 5: Solve for x
    x = 436,914,534,198.53/639,065.04
  6. Step 6: Final answer
    x = 683,677.73

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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.