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Finding the Fourth Proportional to 814.56, 1,124.25 and 478.51

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Solution

The fourth proportional to 814.56, 1,124.25 and 478.51 is: 660.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.56 : 1,124.25 = 478.51 : x
  2. Step 2: Convert to fraction form
    814.56/1,124.25 = 478.51/x
  3. Step 3: Cross multiply
    814.56x = 1,124.25 × 478.51
  4. Step 4: Simplify right side
    814.56x = 537,960.26
  5. Step 5: Solve for x
    x = 537,960.26/814.56
  6. Step 6: Final answer
    x = 660.43

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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.