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Finding the Fourth Proportional to 993.23, 1,370.83 and 551.28

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Solution

The fourth proportional to 993.23, 1,370.83 and 551.28 is: 760.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.23 : 1,370.83 = 551.28 : x
  2. Step 2: Convert to fraction form
    993.23/1,370.83 = 551.28/x
  3. Step 3: Cross multiply
    993.23x = 1,370.83 × 551.28
  4. Step 4: Simplify right side
    993.23x = 755,706.36
  5. Step 5: Solve for x
    x = 755,706.36/993.23
  6. Step 6: Final answer
    x = 760.85

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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.