Home / 1,098.24-1,515.38-766.55

Finding the Fourth Proportional to 1,098.24, 1,515.38 and 766.55

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Solution

The fourth proportional to 1,098.24, 1,515.38 and 766.55 is: 1,057.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.24 : 1,515.38 = 766.55 : x
  2. Step 2: Convert to fraction form
    1,098.24/1,515.38 = 766.55/x
  3. Step 3: Cross multiply
    1,098.24x = 1,515.38 × 766.55
  4. Step 4: Simplify right side
    1,098.24x = 1,161,603.13
  5. Step 5: Solve for x
    x = 1,161,603.13/1,098.24
  6. Step 6: Final answer
    x = 1,057.70

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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.