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Finding the Fourth Proportional to 2,995.90, 4,491.97 and 915.21

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Solution

The fourth proportional to 2,995.90, 4,491.97 and 915.21 is: 1,372.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,995.90 : 4,491.97 = 915.21 : x
  2. Step 2: Convert to fraction form
    2,995.90/4,491.97 = 915.21/x
  3. Step 3: Cross multiply
    2,995.90x = 4,491.97 × 915.21
  4. Step 4: Simplify right side
    2,995.90x = 4,111,093.58
  5. Step 5: Solve for x
    x = 4,111,093.58/2,995.90
  6. Step 6: Final answer
    x = 1,372.24

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1.5x scale

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.