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Finding the Fourth Proportional to 993.23, 1,370.54 and 551.07

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Solution

The fourth proportional to 993.23, 1,370.54 and 551.07 is: 760.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.23 : 1,370.54 = 551.07 : x
  2. Step 2: Convert to fraction form
    993.23/1,370.54 = 551.07/x
  3. Step 3: Cross multiply
    993.23x = 1,370.54 × 551.07
  4. Step 4: Simplify right side
    993.23x = 755,261.76
  5. Step 5: Solve for x
    x = 755,261.76/993.23
  6. Step 6: Final answer
    x = 760.41

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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.