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Finding the Fourth Proportional to 775.76, 1,070.54 and 426.44

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Solution

The fourth proportional to 775.76, 1,070.54 and 426.44 is: 588.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.76 : 1,070.54 = 426.44 : x
  2. Step 2: Convert to fraction form
    775.76/1,070.54 = 426.44/x
  3. Step 3: Cross multiply
    775.76x = 1,070.54 × 426.44
  4. Step 4: Simplify right side
    775.76x = 456,521.08
  5. Step 5: Solve for x
    x = 456,521.08/775.76
  6. Step 6: Final answer
    x = 588.48

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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.