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Finding the Fourth Proportional to 814.72, 1,123.52 and 618.24

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Solution

The fourth proportional to 814.72, 1,123.52 and 618.24 is: 852.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.72 : 1,123.52 = 618.24 : x
  2. Step 2: Convert to fraction form
    814.72/1,123.52 = 618.24/x
  3. Step 3: Cross multiply
    814.72x = 1,123.52 × 618.24
  4. Step 4: Simplify right side
    814.72x = 694,605.00
  5. Step 5: Solve for x
    x = 694,605.00/814.72
  6. Step 6: Final answer
    x = 852.57

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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.