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Finding the Fourth Proportional to 799.36, 1,103.12 and 551.20

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Solution

The fourth proportional to 799.36, 1,103.12 and 551.20 is: 760.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.36 : 1,103.12 = 551.20 : x
  2. Step 2: Convert to fraction form
    799.36/1,103.12 = 551.20/x
  3. Step 3: Cross multiply
    799.36x = 1,103.12 × 551.20
  4. Step 4: Simplify right side
    799.36x = 608,039.74
  5. Step 5: Solve for x
    x = 608,039.74/799.36
  6. Step 6: Final answer
    x = 760.66

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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.