Home / 1,534.10-2,116.80-870.91

Finding the Fourth Proportional to 1,534.10, 2,116.80 and 870.91

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Solution

The fourth proportional to 1,534.10, 2,116.80 and 870.91 is: 1,201.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,534.10 : 2,116.80 = 870.91 : x
  2. Step 2: Convert to fraction form
    1,534.10/2,116.80 = 870.91/x
  3. Step 3: Cross multiply
    1,534.10x = 2,116.80 × 870.91
  4. Step 4: Simplify right side
    1,534.10x = 1,843,542.29
  5. Step 5: Solve for x
    x = 1,843,542.29/1,534.10
  6. Step 6: Final answer
    x = 1,201.71

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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.