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Finding the Fourth Proportional to 2,863.55, 4,295.63 and 915.91

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Solution

The fourth proportional to 2,863.55, 4,295.63 and 915.91 is: 1,373.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,863.55 : 4,295.63 = 915.91 : x
  2. Step 2: Convert to fraction form
    2,863.55/4,295.63 = 915.91/x
  3. Step 3: Cross multiply
    2,863.55x = 4,295.63 × 915.91
  4. Step 4: Simplify right side
    2,863.55x = 3,934,402.02
  5. Step 5: Solve for x
    x = 3,934,402.02/2,863.55
  6. Step 6: Final answer
    x = 1,373.96

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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.