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Finding the Fourth Proportional to 758.91, 1,047.32 and 422.85

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Solution

The fourth proportional to 758.91, 1,047.32 and 422.85 is: 583.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.91 : 1,047.32 = 422.85 : x
  2. Step 2: Convert to fraction form
    758.91/1,047.32 = 422.85/x
  3. Step 3: Cross multiply
    758.91x = 1,047.32 × 422.85
  4. Step 4: Simplify right side
    758.91x = 442,857.15
  5. Step 5: Solve for x
    x = 442,857.15/758.91
  6. Step 6: Final answer
    x = 583.54

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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.