Home / 1,040.12-1,435.20-667.52

Finding the Fourth Proportional to 1,040.12, 1,435.20 and 667.52

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Solution

The fourth proportional to 1,040.12, 1,435.20 and 667.52 is: 921.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.12 : 1,435.20 = 667.52 : x
  2. Step 2: Convert to fraction form
    1,040.12/1,435.20 = 667.52/x
  3. Step 3: Cross multiply
    1,040.12x = 1,435.20 × 667.52
  4. Step 4: Simplify right side
    1,040.12x = 958,024.70
  5. Step 5: Solve for x
    x = 958,024.70/1,040.12
  6. Step 6: Final answer
    x = 921.07

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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.