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Finding the Fourth Proportional to 539.55, 743.65 and 470.30

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Solution

The fourth proportional to 539.55, 743.65 and 470.30 is: 648.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.55 : 743.65 = 470.30 : x
  2. Step 2: Convert to fraction form
    539.55/743.65 = 470.30/x
  3. Step 3: Cross multiply
    539.55x = 743.65 × 470.30
  4. Step 4: Simplify right side
    539.55x = 349,733.70
  5. Step 5: Solve for x
    x = 349,733.70/539.55
  6. Step 6: Final answer
    x = 648.20

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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.