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Finding the Fourth Proportional to 854.83, 1,174.54 and 679.87

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Solution

The fourth proportional to 854.83, 1,174.54 and 679.87 is: 934.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.83 : 1,174.54 = 679.87 : x
  2. Step 2: Convert to fraction form
    854.83/1,174.54 = 679.87/x
  3. Step 3: Cross multiply
    854.83x = 1,174.54 × 679.87
  4. Step 4: Simplify right side
    854.83x = 798,534.51
  5. Step 5: Solve for x
    x = 798,534.51/854.83
  6. Step 6: Final answer
    x = 934.14

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.