Home / 1,540.31-2,125.63-841.69

Finding the Fourth Proportional to 1,540.31, 2,125.63 and 841.69

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Solution

The fourth proportional to 1,540.31, 2,125.63 and 841.69 is: 1,161.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.31 : 2,125.63 = 841.69 : x
  2. Step 2: Convert to fraction form
    1,540.31/2,125.63 = 841.69/x
  3. Step 3: Cross multiply
    1,540.31x = 2,125.63 × 841.69
  4. Step 4: Simplify right side
    1,540.31x = 1,789,118.30
  5. Step 5: Solve for x
    x = 1,789,118.30/1,540.31
  6. Step 6: Final answer
    x = 1,161.53

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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.