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Finding the Fourth Proportional to 643,657.20, 965,658.60 and 574,018.80

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Solution

The fourth proportional to 643,657.20, 965,658.60 and 574,018.80 is: 861,182.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,657.20 : 965,658.60 = 574,018.80 : x
  2. Step 2: Convert to fraction form
    643,657.20/965,658.60 = 574,018.80/x
  3. Step 3: Cross multiply
    643,657.20x = 965,658.60 × 574,018.80
  4. Step 4: Simplify right side
    643,657.20x = 554,306,190,781.68
  5. Step 5: Solve for x
    x = 554,306,190,781.68/643,657.20
  6. Step 6: Final answer
    x = 861,182.30

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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.