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Finding the Fourth Proportional to 1,326.88, 1,830.42 and 854.68

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Solution

The fourth proportional to 1,326.88, 1,830.42 and 854.68 is: 1,179.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.88 : 1,830.42 = 854.68 : x
  2. Step 2: Convert to fraction form
    1,326.88/1,830.42 = 854.68/x
  3. Step 3: Cross multiply
    1,326.88x = 1,830.42 × 854.68
  4. Step 4: Simplify right side
    1,326.88x = 1,564,423.37
  5. Step 5: Solve for x
    x = 1,564,423.37/1,326.88
  6. Step 6: Final answer
    x = 1,179.02

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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.