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Finding the Fourth Proportional to 775.67, 1,070.34 and 426.29

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Solution

The fourth proportional to 775.67, 1,070.34 and 426.29 is: 588.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.67 : 1,070.34 = 426.29 : x
  2. Step 2: Convert to fraction form
    775.67/1,070.34 = 426.29/x
  3. Step 3: Cross multiply
    775.67x = 1,070.34 × 426.29
  4. Step 4: Simplify right side
    775.67x = 456,275.24
  5. Step 5: Solve for x
    x = 456,275.24/775.67
  6. Step 6: Final answer
    x = 588.23

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1.5x scale

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.