Home / 1,540.40-2,311.47-810.18

Finding the Fourth Proportional to 1,540.40, 2,311.47 and 810.18

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Solution

The fourth proportional to 1,540.40, 2,311.47 and 810.18 is: 1,215.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.40 : 2,311.47 = 810.18 : x
  2. Step 2: Convert to fraction form
    1,540.40/2,311.47 = 810.18/x
  3. Step 3: Cross multiply
    1,540.40x = 2,311.47 × 810.18
  4. Step 4: Simplify right side
    1,540.40x = 1,872,706.76
  5. Step 5: Solve for x
    x = 1,872,706.76/1,540.40
  6. Step 6: Final answer
    x = 1,215.73

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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.