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Finding the Fourth Proportional to 814.69, 1,220.20 and 630.62

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Solution

The fourth proportional to 814.69, 1,220.20 and 630.62 is: 944.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.69 : 1,220.20 = 630.62 : x
  2. Step 2: Convert to fraction form
    814.69/1,220.20 = 630.62/x
  3. Step 3: Cross multiply
    814.69x = 1,220.20 × 630.62
  4. Step 4: Simplify right side
    814.69x = 769,482.52
  5. Step 5: Solve for x
    x = 769,482.52/814.69
  6. Step 6: Final answer
    x = 944.51

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Half scale
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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.