Home / 1,540.32-2,125.67-841.70

Finding the Fourth Proportional to 1,540.32, 2,125.67 and 841.70

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Solution

The fourth proportional to 1,540.32, 2,125.67 and 841.70 is: 1,161.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.32 : 2,125.67 = 841.70 : x
  2. Step 2: Convert to fraction form
    1,540.32/2,125.67 = 841.70/x
  3. Step 3: Cross multiply
    1,540.32x = 2,125.67 × 841.70
  4. Step 4: Simplify right side
    1,540.32x = 1,789,161.60
  5. Step 5: Solve for x
    x = 1,789,161.60/1,540.32
  6. Step 6: Final answer
    x = 1,161.55

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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.