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Finding the Fourth Proportional to 353.64, 487.53 and 292.80

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Solution

The fourth proportional to 353.64, 487.53 and 292.80 is: 403.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.64 : 487.53 = 292.80 : x
  2. Step 2: Convert to fraction form
    353.64/487.53 = 292.80/x
  3. Step 3: Cross multiply
    353.64x = 487.53 × 292.80
  4. Step 4: Simplify right side
    353.64x = 142,748.78
  5. Step 5: Solve for x
    x = 142,748.78/353.64
  6. Step 6: Final answer
    x = 403.66

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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.