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Finding the Fourth Proportional to 543,781.80, 815,672.70 and 516,225.60

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Solution

The fourth proportional to 543,781.80, 815,672.70 and 516,225.60 is: 774,338.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,781.80 : 815,672.70 = 516,225.60 : x
  2. Step 2: Convert to fraction form
    543,781.80/815,672.70 = 516,225.60/x
  3. Step 3: Cross multiply
    543,781.80x = 815,672.70 × 516,225.60
  4. Step 4: Simplify right side
    543,781.80x = 421,071,128,961.12
  5. Step 5: Solve for x
    x = 421,071,128,961.12/543,781.80
  6. Step 6: Final answer
    x = 774,338.40

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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.