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Finding the Fourth Proportional to 360.72, 497.88 and 287.55

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Solution

The fourth proportional to 360.72, 497.88 and 287.55 is: 396.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.72 : 497.88 = 287.55 : x
  2. Step 2: Convert to fraction form
    360.72/497.88 = 287.55/x
  3. Step 3: Cross multiply
    360.72x = 497.88 × 287.55
  4. Step 4: Simplify right side
    360.72x = 143,165.39
  5. Step 5: Solve for x
    x = 143,165.39/360.72
  6. Step 6: Final answer
    x = 396.89

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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.