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Finding the Fourth Proportional to 814.10, 1,123.55 and 464.79

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Solution

The fourth proportional to 814.10, 1,123.55 and 464.79 is: 641.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.10 : 1,123.55 = 464.79 : x
  2. Step 2: Convert to fraction form
    814.10/1,123.55 = 464.79/x
  3. Step 3: Cross multiply
    814.10x = 1,123.55 × 464.79
  4. Step 4: Simplify right side
    814.10x = 522,206.86
  5. Step 5: Solve for x
    x = 522,206.86/814.10
  6. Step 6: Final answer
    x = 641.45

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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.