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Finding the Fourth Proportional to 855.88, 1,283.98 and 342.92

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Solution

The fourth proportional to 855.88, 1,283.98 and 342.92 is: 514.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.88 : 1,283.98 = 342.92 : x
  2. Step 2: Convert to fraction form
    855.88/1,283.98 = 342.92/x
  3. Step 3: Cross multiply
    855.88x = 1,283.98 × 342.92
  4. Step 4: Simplify right side
    855.88x = 440,302.42
  5. Step 5: Solve for x
    x = 440,302.42/855.88
  6. Step 6: Final answer
    x = 514.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.