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Finding the Fourth Proportional to 621.75, 932.75 and 210.87

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Solution

The fourth proportional to 621.75, 932.75 and 210.87 is: 316.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.75 : 932.75 = 210.87 : x
  2. Step 2: Convert to fraction form
    621.75/932.75 = 210.87/x
  3. Step 3: Cross multiply
    621.75x = 932.75 × 210.87
  4. Step 4: Simplify right side
    621.75x = 196,687.94
  5. Step 5: Solve for x
    x = 196,687.94/621.75
  6. Step 6: Final answer
    x = 316.35

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1.5x scale

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.