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Finding the Fourth Proportional to 769.48, 1,061.82 and 474.75

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Solution

The fourth proportional to 769.48, 1,061.82 and 474.75 is: 655.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    769.48 : 1,061.82 = 474.75 : x
  2. Step 2: Convert to fraction form
    769.48/1,061.82 = 474.75/x
  3. Step 3: Cross multiply
    769.48x = 1,061.82 × 474.75
  4. Step 4: Simplify right side
    769.48x = 504,099.05
  5. Step 5: Solve for x
    x = 504,099.05/769.48
  6. Step 6: Final answer
    x = 655.12

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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.