Home / 1,915.40-2,872.70-1,134.92

Finding the Fourth Proportional to 1,915.40, 2,872.70 and 1,134.92

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Solution

The fourth proportional to 1,915.40, 2,872.70 and 1,134.92 is: 1,702.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.40 : 2,872.70 = 1,134.92 : x
  2. Step 2: Convert to fraction form
    1,915.40/2,872.70 = 1,134.92/x
  3. Step 3: Cross multiply
    1,915.40x = 2,872.70 × 1,134.92
  4. Step 4: Simplify right side
    1,915.40x = 3,260,284.68
  5. Step 5: Solve for x
    x = 3,260,284.68/1,915.40
  6. Step 6: Final answer
    x = 1,702.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.