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Finding the Fourth Proportional to 2,995, 4,492.88 and 915.07

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Solution

The fourth proportional to 2,995, 4,492.88 and 915.07 is: 1,372.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,995 : 4,492.88 = 915.07 : x
  2. Step 2: Convert to fraction form
    2,995/4,492.88 = 915.07/x
  3. Step 3: Cross multiply
    2,995x = 4,492.88 × 915.07
  4. Step 4: Simplify right side
    2,995x = 4,111,299.70
  5. Step 5: Solve for x
    x = 4,111,299.70/2,995
  6. Step 6: Final answer
    x = 1,372.72

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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.