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Finding the Fourth Proportional to 830.67, 1,147.10 and 520.71

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Solution

The fourth proportional to 830.67, 1,147.10 and 520.71 is: 719.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.67 : 1,147.10 = 520.71 : x
  2. Step 2: Convert to fraction form
    830.67/1,147.10 = 520.71/x
  3. Step 3: Cross multiply
    830.67x = 1,147.10 × 520.71
  4. Step 4: Simplify right side
    830.67x = 597,306.44
  5. Step 5: Solve for x
    x = 597,306.44/830.67
  6. Step 6: Final answer
    x = 719.07

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.