Home / 1,915.77-2,644.59-1,217.14

Finding the Fourth Proportional to 1,915.77, 2,644.59 and 1,217.14

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Solution

The fourth proportional to 1,915.77, 2,644.59 and 1,217.14 is: 1,680.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.77 : 2,644.59 = 1,217.14 : x
  2. Step 2: Convert to fraction form
    1,915.77/2,644.59 = 1,217.14/x
  3. Step 3: Cross multiply
    1,915.77x = 2,644.59 × 1,217.14
  4. Step 4: Simplify right side
    1,915.77x = 3,218,836.27
  5. Step 5: Solve for x
    x = 3,218,836.27/1,915.77
  6. Step 6: Final answer
    x = 1,680.18

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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.