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Finding the Fourth Proportional to 909.03, 1,252.99 and 613.78

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Solution

The fourth proportional to 909.03, 1,252.99 and 613.78 is: 846.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.03 : 1,252.99 = 613.78 : x
  2. Step 2: Convert to fraction form
    909.03/1,252.99 = 613.78/x
  3. Step 3: Cross multiply
    909.03x = 1,252.99 × 613.78
  4. Step 4: Simplify right side
    909.03x = 769,060.20
  5. Step 5: Solve for x
    x = 769,060.20/909.03
  6. Step 6: Final answer
    x = 846.02

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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.