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Finding the Fourth Proportional to 1,946.88, 2,915.20 and 1,491.20

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Solution

The fourth proportional to 1,946.88, 2,915.20 and 1,491.20 is: 2,232.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,946.88 : 2,915.20 = 1,491.20 : x
  2. Step 2: Convert to fraction form
    1,946.88/2,915.20 = 1,491.20/x
  3. Step 3: Cross multiply
    1,946.88x = 2,915.20 × 1,491.20
  4. Step 4: Simplify right side
    1,946.88x = 4,347,146.24
  5. Step 5: Solve for x
    x = 4,347,146.24/1,946.88
  6. Step 6: Final answer
    x = 2,232.88

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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.