Home / 1,538.97-2,318.85-1,271.07

Finding the Fourth Proportional to 1,538.97, 2,318.85 and 1,271.07

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Solution

The fourth proportional to 1,538.97, 2,318.85 and 1,271.07 is: 1,915.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.97 : 2,318.85 = 1,271.07 : x
  2. Step 2: Convert to fraction form
    1,538.97/2,318.85 = 1,271.07/x
  3. Step 3: Cross multiply
    1,538.97x = 2,318.85 × 1,271.07
  4. Step 4: Simplify right side
    1,538.97x = 2,947,405.10
  5. Step 5: Solve for x
    x = 2,947,405.10/1,538.97
  6. Step 6: Final answer
    x = 1,915.18

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.