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Finding the Fourth Proportional to 543.59, 814.61 and 478.43

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Solution

The fourth proportional to 543.59, 814.61 and 478.43 is: 716.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.59 : 814.61 = 478.43 : x
  2. Step 2: Convert to fraction form
    543.59/814.61 = 478.43/x
  3. Step 3: Cross multiply
    543.59x = 814.61 × 478.43
  4. Step 4: Simplify right side
    543.59x = 389,727.40
  5. Step 5: Solve for x
    x = 389,727.40/543.59
  6. Step 6: Final answer
    x = 716.96

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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.