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Finding the Fourth Proportional to 908.02, 1,253.04 and 515.04

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Solution

The fourth proportional to 908.02, 1,253.04 and 515.04 is: 710.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.02 : 1,253.04 = 515.04 : x
  2. Step 2: Convert to fraction form
    908.02/1,253.04 = 515.04/x
  3. Step 3: Cross multiply
    908.02x = 1,253.04 × 515.04
  4. Step 4: Simplify right side
    908.02x = 645,365.72
  5. Step 5: Solve for x
    x = 645,365.72/908.02
  6. Step 6: Final answer
    x = 710.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.