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Finding the Fourth Proportional to 862.98, 1,293.86 and 277.80

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Solution

The fourth proportional to 862.98, 1,293.86 and 277.80 is: 416.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.98 : 1,293.86 = 277.80 : x
  2. Step 2: Convert to fraction form
    862.98/1,293.86 = 277.80/x
  3. Step 3: Cross multiply
    862.98x = 1,293.86 × 277.80
  4. Step 4: Simplify right side
    862.98x = 359,432.92
  5. Step 5: Solve for x
    x = 359,432.92/862.98
  6. Step 6: Final answer
    x = 416.50

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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.