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Finding the Fourth Proportional to 543.04, 747.76 and 455.56

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Solution

The fourth proportional to 543.04, 747.76 and 455.56 is: 627.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.04 : 747.76 = 455.56 : x
  2. Step 2: Convert to fraction form
    543.04/747.76 = 455.56/x
  3. Step 3: Cross multiply
    543.04x = 747.76 × 455.56
  4. Step 4: Simplify right side
    543.04x = 340,649.55
  5. Step 5: Solve for x
    x = 340,649.55/543.04
  6. Step 6: Final answer
    x = 627.30

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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.