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Finding the Fourth Proportional to 775.88, 1,162.26 and 451.40

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Solution

The fourth proportional to 775.88, 1,162.26 and 451.40 is: 676.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.88 : 1,162.26 = 451.40 : x
  2. Step 2: Convert to fraction form
    775.88/1,162.26 = 451.40/x
  3. Step 3: Cross multiply
    775.88x = 1,162.26 × 451.40
  4. Step 4: Simplify right side
    775.88x = 524,644.16
  5. Step 5: Solve for x
    x = 524,644.16/775.88
  6. Step 6: Final answer
    x = 676.19

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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.