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Finding the Fourth Proportional to 758.01, 1,139.55 and 622.07

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Solution

The fourth proportional to 758.01, 1,139.55 and 622.07 is: 935.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.01 : 1,139.55 = 622.07 : x
  2. Step 2: Convert to fraction form
    758.01/1,139.55 = 622.07/x
  3. Step 3: Cross multiply
    758.01x = 1,139.55 × 622.07
  4. Step 4: Simplify right side
    758.01x = 708,879.87
  5. Step 5: Solve for x
    x = 708,879.87/758.01
  6. Step 6: Final answer
    x = 935.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.