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Finding the Fourth Proportional to 655.20, 903.60 and 551.52

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Solution

The fourth proportional to 655.20, 903.60 and 551.52 is: 760.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.20 : 903.60 = 551.52 : x
  2. Step 2: Convert to fraction form
    655.20/903.60 = 551.52/x
  3. Step 3: Cross multiply
    655.20x = 903.60 × 551.52
  4. Step 4: Simplify right side
    655.20x = 498,353.47
  5. Step 5: Solve for x
    x = 498,353.47/655.20
  6. Step 6: Final answer
    x = 760.61

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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.