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Finding the Fourth Proportional to 967.36, 1,335.84 and 618.65

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Solution

The fourth proportional to 967.36, 1,335.84 and 618.65 is: 854.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    967.36 : 1,335.84 = 618.65 : x
  2. Step 2: Convert to fraction form
    967.36/1,335.84 = 618.65/x
  3. Step 3: Cross multiply
    967.36x = 1,335.84 × 618.65
  4. Step 4: Simplify right side
    967.36x = 826,414.32
  5. Step 5: Solve for x
    x = 826,414.32/967.36
  6. Step 6: Final answer
    x = 854.30

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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.