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Finding the Fourth Proportional to 621.75, 932.19 and 309.18

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Solution

The fourth proportional to 621.75, 932.19 and 309.18 is: 463.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.75 : 932.19 = 309.18 : x
  2. Step 2: Convert to fraction form
    621.75/932.19 = 309.18/x
  3. Step 3: Cross multiply
    621.75x = 932.19 × 309.18
  4. Step 4: Simplify right side
    621.75x = 288,214.50
  5. Step 5: Solve for x
    x = 288,214.50/621.75
  6. Step 6: Final answer
    x = 463.55

Related Problems

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Double scale
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Similar ratio
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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.