Home / 1,540.17-2,125.40-841.55

Finding the Fourth Proportional to 1,540.17, 2,125.40 and 841.55

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Solution

The fourth proportional to 1,540.17, 2,125.40 and 841.55 is: 1,161.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.17 : 2,125.40 = 841.55 : x
  2. Step 2: Convert to fraction form
    1,540.17/2,125.40 = 841.55/x
  3. Step 3: Cross multiply
    1,540.17x = 2,125.40 × 841.55
  4. Step 4: Simplify right side
    1,540.17x = 1,788,630.37
  5. Step 5: Solve for x
    x = 1,788,630.37/1,540.17
  6. Step 6: Final answer
    x = 1,161.32

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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.