Home / 1,540.36-2,125.72-841.74

Finding the Fourth Proportional to 1,540.36, 2,125.72 and 841.74

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Solution

The fourth proportional to 1,540.36, 2,125.72 and 841.74 is: 1,161.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.36 : 2,125.72 = 841.74 : x
  2. Step 2: Convert to fraction form
    1,540.36/2,125.72 = 841.74/x
  3. Step 3: Cross multiply
    1,540.36x = 2,125.72 × 841.74
  4. Step 4: Simplify right side
    1,540.36x = 1,789,303.55
  5. Step 5: Solve for x
    x = 1,789,303.55/1,540.36
  6. Step 6: Final answer
    x = 1,161.61

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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.