Home / 1,534.10-2,116.82-861.88

Finding the Fourth Proportional to 1,534.10, 2,116.82 and 861.88

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Solution

The fourth proportional to 1,534.10, 2,116.82 and 861.88 is: 1,189.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,534.10 : 2,116.82 = 861.88 : x
  2. Step 2: Convert to fraction form
    1,534.10/2,116.82 = 861.88/x
  3. Step 3: Cross multiply
    1,534.10x = 2,116.82 × 861.88
  4. Step 4: Simplify right side
    1,534.10x = 1,824,434.24
  5. Step 5: Solve for x
    x = 1,824,434.24/1,534.10
  6. Step 6: Final answer
    x = 1,189.26

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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.