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Finding the Fourth Proportional to 1,014.12, 1,520.96 and 397.71

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Solution

The fourth proportional to 1,014.12, 1,520.96 and 397.71 is: 596.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.12 : 1,520.96 = 397.71 : x
  2. Step 2: Convert to fraction form
    1,014.12/1,520.96 = 397.71/x
  3. Step 3: Cross multiply
    1,014.12x = 1,520.96 × 397.71
  4. Step 4: Simplify right side
    1,014.12x = 604,899.01
  5. Step 5: Solve for x
    x = 604,899.01/1,014.12
  6. Step 6: Final answer
    x = 596.48

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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.