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Finding the Fourth Proportional to 536.52, 740.70 and 478.20

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Solution

The fourth proportional to 536.52, 740.70 and 478.20 is: 660.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.52 : 740.70 = 478.20 : x
  2. Step 2: Convert to fraction form
    536.52/740.70 = 478.20/x
  3. Step 3: Cross multiply
    536.52x = 740.70 × 478.20
  4. Step 4: Simplify right side
    536.52x = 354,202.74
  5. Step 5: Solve for x
    x = 354,202.74/536.52
  6. Step 6: Final answer
    x = 660.19

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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.