Home / 1,915.66-2,644.28-1,207.99

Finding the Fourth Proportional to 1,915.66, 2,644.28 and 1,207.99

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Solution

The fourth proportional to 1,915.66, 2,644.28 and 1,207.99 is: 1,667.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.66 : 2,644.28 = 1,207.99 : x
  2. Step 2: Convert to fraction form
    1,915.66/2,644.28 = 1,207.99/x
  3. Step 3: Cross multiply
    1,915.66x = 2,644.28 × 1,207.99
  4. Step 4: Simplify right side
    1,915.66x = 3,194,263.80
  5. Step 5: Solve for x
    x = 3,194,263.80/1,915.66
  6. Step 6: Final answer
    x = 1,667.45

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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.