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Finding the Fourth Proportional to 814.87, 1,124.40 and 483.18

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Solution

The fourth proportional to 814.87, 1,124.40 and 483.18 is: 666.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.87 : 1,124.40 = 483.18 : x
  2. Step 2: Convert to fraction form
    814.87/1,124.40 = 483.18/x
  3. Step 3: Cross multiply
    814.87x = 1,124.40 × 483.18
  4. Step 4: Simplify right side
    814.87x = 543,287.59
  5. Step 5: Solve for x
    x = 543,287.59/814.87
  6. Step 6: Final answer
    x = 666.72

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Double scale
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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.