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Finding the Fourth Proportional to 902.95, 1,354.54 and 286.43

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Solution

The fourth proportional to 902.95, 1,354.54 and 286.43 is: 429.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.95 : 1,354.54 = 286.43 : x
  2. Step 2: Convert to fraction form
    902.95/1,354.54 = 286.43/x
  3. Step 3: Cross multiply
    902.95x = 1,354.54 × 286.43
  4. Step 4: Simplify right side
    902.95x = 387,982.26
  5. Step 5: Solve for x
    x = 387,982.26/902.95
  6. Step 6: Final answer
    x = 429.68

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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.