Home / 1,180.18-1,759.43-1,087.70

Finding the Fourth Proportional to 1,180.18, 1,759.43 and 1,087.70

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Solution

The fourth proportional to 1,180.18, 1,759.43 and 1,087.70 is: 1,621.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.18 : 1,759.43 = 1,087.70 : x
  2. Step 2: Convert to fraction form
    1,180.18/1,759.43 = 1,087.70/x
  3. Step 3: Cross multiply
    1,180.18x = 1,759.43 × 1,087.70
  4. Step 4: Simplify right side
    1,180.18x = 1,913,732.01
  5. Step 5: Solve for x
    x = 1,913,732.01/1,180.18
  6. Step 6: Final answer
    x = 1,621.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.