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Finding the Fourth Proportional to 410.43, 615.65 and 403.55

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Solution

The fourth proportional to 410.43, 615.65 and 403.55 is: 605.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.43 : 615.65 = 403.55 : x
  2. Step 2: Convert to fraction form
    410.43/615.65 = 403.55/x
  3. Step 3: Cross multiply
    410.43x = 615.65 × 403.55
  4. Step 4: Simplify right side
    410.43x = 248,445.56
  5. Step 5: Solve for x
    x = 248,445.56/410.43
  6. Step 6: Final answer
    x = 605.33

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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.