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Finding the Fourth Proportional to 949.35, 1,310.17 and 551.13

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Solution

The fourth proportional to 949.35, 1,310.17 and 551.13 is: 760.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.35 : 1,310.17 = 551.13 : x
  2. Step 2: Convert to fraction form
    949.35/1,310.17 = 551.13/x
  3. Step 3: Cross multiply
    949.35x = 1,310.17 × 551.13
  4. Step 4: Simplify right side
    949.35x = 722,073.99
  5. Step 5: Solve for x
    x = 722,073.99/949.35
  6. Step 6: Final answer
    x = 760.60

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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.