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Finding the Fourth Proportional to 1,331.88, 1,838.22 and 860.35

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Solution

The fourth proportional to 1,331.88, 1,838.22 and 860.35 is: 1,187.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.88 : 1,838.22 = 860.35 : x
  2. Step 2: Convert to fraction form
    1,331.88/1,838.22 = 860.35/x
  3. Step 3: Cross multiply
    1,331.88x = 1,838.22 × 860.35
  4. Step 4: Simplify right side
    1,331.88x = 1,581,512.58
  5. Step 5: Solve for x
    x = 1,581,512.58/1,331.88
  6. Step 6: Final answer
    x = 1,187.43

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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.