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Finding the Fourth Proportional to 775.41, 1,070.08 and 426.10

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Solution

The fourth proportional to 775.41, 1,070.08 and 426.10 is: 588.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.41 : 1,070.08 = 426.10 : x
  2. Step 2: Convert to fraction form
    775.41/1,070.08 = 426.10/x
  3. Step 3: Cross multiply
    775.41x = 1,070.08 × 426.10
  4. Step 4: Simplify right side
    775.41x = 455,961.09
  5. Step 5: Solve for x
    x = 455,961.09/775.41
  6. Step 6: Final answer
    x = 588.03

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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.