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Finding the Fourth Proportional to 902.90, 1,354.36 and 864.02

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Solution

The fourth proportional to 902.90, 1,354.36 and 864.02 is: 1,296.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.90 : 1,354.36 = 864.02 : x
  2. Step 2: Convert to fraction form
    902.90/1,354.36 = 864.02/x
  3. Step 3: Cross multiply
    902.90x = 1,354.36 × 864.02
  4. Step 4: Simplify right side
    902.90x = 1,170,194.13
  5. Step 5: Solve for x
    x = 1,170,194.13/902.90
  6. Step 6: Final answer
    x = 1,296.04

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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.