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Finding the Fourth Proportional to 949.84, 1,310.78 and 551.58

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Solution

The fourth proportional to 949.84, 1,310.78 and 551.58 is: 761.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.84 : 1,310.78 = 551.58 : x
  2. Step 2: Convert to fraction form
    949.84/1,310.78 = 551.58/x
  3. Step 3: Cross multiply
    949.84x = 1,310.78 × 551.58
  4. Step 4: Simplify right side
    949.84x = 723,000.03
  5. Step 5: Solve for x
    x = 723,000.03/949.84
  6. Step 6: Final answer
    x = 761.18

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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.