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Finding the Fourth Proportional to 421.32, 630.54 and 366.92

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Solution

The fourth proportional to 421.32, 630.54 and 366.92 is: 549.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.32 : 630.54 = 366.92 : x
  2. Step 2: Convert to fraction form
    421.32/630.54 = 366.92/x
  3. Step 3: Cross multiply
    421.32x = 630.54 × 366.92
  4. Step 4: Simplify right side
    421.32x = 231,357.74
  5. Step 5: Solve for x
    x = 231,357.74/421.32
  6. Step 6: Final answer
    x = 549.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.