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Finding the Fourth Proportional to 953.44, 1,315.78 and 560.79

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Solution

The fourth proportional to 953.44, 1,315.78 and 560.79 is: 773.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.44 : 1,315.78 = 560.79 : x
  2. Step 2: Convert to fraction form
    953.44/1,315.78 = 560.79/x
  3. Step 3: Cross multiply
    953.44x = 1,315.78 × 560.79
  4. Step 4: Simplify right side
    953.44x = 737,874.86
  5. Step 5: Solve for x
    x = 737,874.86/953.44
  6. Step 6: Final answer
    x = 773.91

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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.