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Finding the Fourth Proportional to 639,897.60, 959,385.60 and 359,500.80

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Solution

The fourth proportional to 639,897.60, 959,385.60 and 359,500.80 is: 538,992.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,897.60 : 959,385.60 = 359,500.80 : x
  2. Step 2: Convert to fraction form
    639,897.60/959,385.60 = 359,500.80/x
  3. Step 3: Cross multiply
    639,897.60x = 959,385.60 × 359,500.80
  4. Step 4: Simplify right side
    639,897.60x = 344,899,890,708.48
  5. Step 5: Solve for x
    x = 344,899,890,708.48/639,897.60
  6. Step 6: Final answer
    x = 538,992.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.