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Finding the Fourth Proportional to 993.38, 1,370.85 and 551.27

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Solution

The fourth proportional to 993.38, 1,370.85 and 551.27 is: 760.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.38 : 1,370.85 = 551.27 : x
  2. Step 2: Convert to fraction form
    993.38/1,370.85 = 551.27/x
  3. Step 3: Cross multiply
    993.38x = 1,370.85 × 551.27
  4. Step 4: Simplify right side
    993.38x = 755,701.63
  5. Step 5: Solve for x
    x = 755,701.63/993.38
  6. Step 6: Final answer
    x = 760.74

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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.