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Finding the Fourth Proportional to 908.62, 1,360.77 and 763.90

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Solution

The fourth proportional to 908.62, 1,360.77 and 763.90 is: 1,144.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.62 : 1,360.77 = 763.90 : x
  2. Step 2: Convert to fraction form
    908.62/1,360.77 = 763.90/x
  3. Step 3: Cross multiply
    908.62x = 1,360.77 × 763.90
  4. Step 4: Simplify right side
    908.62x = 1,039,492.20
  5. Step 5: Solve for x
    x = 1,039,492.20/908.62
  6. Step 6: Final answer
    x = 1,144.03

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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.