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Finding the Fourth Proportional to 621.40, 927.02 and 512.88

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Solution

The fourth proportional to 621.40, 927.02 and 512.88 is: 765.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.40 : 927.02 = 512.88 : x
  2. Step 2: Convert to fraction form
    621.40/927.02 = 512.88/x
  3. Step 3: Cross multiply
    621.40x = 927.02 × 512.88
  4. Step 4: Simplify right side
    621.40x = 475,450.02
  5. Step 5: Solve for x
    x = 475,450.02/621.40
  6. Step 6: Final answer
    x = 765.13

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.