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Finding the Fourth Proportional to 360.81, 497.90 and 203.47

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Solution

The fourth proportional to 360.81, 497.90 and 203.47 is: 280.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.81 : 497.90 = 203.47 : x
  2. Step 2: Convert to fraction form
    360.81/497.90 = 203.47/x
  3. Step 3: Cross multiply
    360.81x = 497.90 × 203.47
  4. Step 4: Simplify right side
    360.81x = 101,307.71
  5. Step 5: Solve for x
    x = 101,307.71/360.81
  6. Step 6: Final answer
    x = 280.78

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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.