Home / 1,240.20-1,860.30-1,158.18

Finding the Fourth Proportional to 1,240.20, 1,860.30 and 1,158.18

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Solution

The fourth proportional to 1,240.20, 1,860.30 and 1,158.18 is: 1,737.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.20 : 1,860.30 = 1,158.18 : x
  2. Step 2: Convert to fraction form
    1,240.20/1,860.30 = 1,158.18/x
  3. Step 3: Cross multiply
    1,240.20x = 1,860.30 × 1,158.18
  4. Step 4: Simplify right side
    1,240.20x = 2,154,562.25
  5. Step 5: Solve for x
    x = 2,154,562.25/1,240.20
  6. Step 6: Final answer
    x = 1,737.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.