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Finding the Fourth Proportional to 543.30, 749.16 and 454.74

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Solution

The fourth proportional to 543.30, 749.16 and 454.74 is: 627.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.30 : 749.16 = 454.74 : x
  2. Step 2: Convert to fraction form
    543.30/749.16 = 454.74/x
  3. Step 3: Cross multiply
    543.30x = 749.16 × 454.74
  4. Step 4: Simplify right side
    543.30x = 340,673.02
  5. Step 5: Solve for x
    x = 340,673.02/543.30
  6. Step 6: Final answer
    x = 627.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.