Home / 1,211.40-1,817.10-1,132.20

Finding the Fourth Proportional to 1,211.40, 1,817.10 and 1,132.20

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Solution

The fourth proportional to 1,211.40, 1,817.10 and 1,132.20 is: 1,698.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.40 : 1,817.10 = 1,132.20 : x
  2. Step 2: Convert to fraction form
    1,211.40/1,817.10 = 1,132.20/x
  3. Step 3: Cross multiply
    1,211.40x = 1,817.10 × 1,132.20
  4. Step 4: Simplify right side
    1,211.40x = 2,057,320.62
  5. Step 5: Solve for x
    x = 2,057,320.62/1,211.40
  6. Step 6: Final answer
    x = 1,698.30

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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.