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Finding the Fourth Proportional to 845.51, 1,167.31 and 547.28

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Solution

The fourth proportional to 845.51, 1,167.31 and 547.28 is: 755.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.51 : 1,167.31 = 547.28 : x
  2. Step 2: Convert to fraction form
    845.51/1,167.31 = 547.28/x
  3. Step 3: Cross multiply
    845.51x = 1,167.31 × 547.28
  4. Step 4: Simplify right side
    845.51x = 638,845.42
  5. Step 5: Solve for x
    x = 638,845.42/845.51
  6. Step 6: Final answer
    x = 755.57

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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.