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Finding the Fourth Proportional to 949.51, 1,310.40 and 551.32

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Solution

The fourth proportional to 949.51, 1,310.40 and 551.32 is: 760.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.51 : 1,310.40 = 551.32 : x
  2. Step 2: Convert to fraction form
    949.51/1,310.40 = 551.32/x
  3. Step 3: Cross multiply
    949.51x = 1,310.40 × 551.32
  4. Step 4: Simplify right side
    949.51x = 722,449.73
  5. Step 5: Solve for x
    x = 722,449.73/949.51
  6. Step 6: Final answer
    x = 760.87

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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.