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Finding the Fourth Proportional to 621.02, 931.44 and 499.52

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Solution

The fourth proportional to 621.02, 931.44 and 499.52 is: 749.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.02 : 931.44 = 499.52 : x
  2. Step 2: Convert to fraction form
    621.02/931.44 = 499.52/x
  3. Step 3: Cross multiply
    621.02x = 931.44 × 499.52
  4. Step 4: Simplify right side
    621.02x = 465,272.91
  5. Step 5: Solve for x
    x = 465,272.91/621.02
  6. Step 6: Final answer
    x = 749.21

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Double scale
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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.