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Finding the Fourth Proportional to 621.66, 932.16 and 210.66

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Solution

The fourth proportional to 621.66, 932.16 and 210.66 is: 315.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.66 : 932.16 = 210.66 : x
  2. Step 2: Convert to fraction form
    621.66/932.16 = 210.66/x
  3. Step 3: Cross multiply
    621.66x = 932.16 × 210.66
  4. Step 4: Simplify right side
    621.66x = 196,368.83
  5. Step 5: Solve for x
    x = 196,368.83/621.66
  6. Step 6: Final answer
    x = 315.88

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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.