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Finding the Fourth Proportional to 847.12, 1,168.64 and 552.40

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Solution

The fourth proportional to 847.12, 1,168.64 and 552.40 is: 762.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.12 : 1,168.64 = 552.40 : x
  2. Step 2: Convert to fraction form
    847.12/1,168.64 = 552.40/x
  3. Step 3: Cross multiply
    847.12x = 1,168.64 × 552.40
  4. Step 4: Simplify right side
    847.12x = 645,556.74
  5. Step 5: Solve for x
    x = 645,556.74/847.12
  6. Step 6: Final answer
    x = 762.06

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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.