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Finding the Fourth Proportional to 848.72, 1,171.28 and 517.16

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Solution

The fourth proportional to 848.72, 1,171.28 and 517.16 is: 713.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.72 : 1,171.28 = 517.16 : x
  2. Step 2: Convert to fraction form
    848.72/1,171.28 = 517.16/x
  3. Step 3: Cross multiply
    848.72x = 1,171.28 × 517.16
  4. Step 4: Simplify right side
    848.72x = 605,734.60
  5. Step 5: Solve for x
    x = 605,734.60/848.72
  6. Step 6: Final answer
    x = 713.71

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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.