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Finding the Fourth Proportional to 798.41, 1,197.61 and 278.41

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Solution

The fourth proportional to 798.41, 1,197.61 and 278.41 is: 417.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.41 : 1,197.61 = 278.41 : x
  2. Step 2: Convert to fraction form
    798.41/1,197.61 = 278.41/x
  3. Step 3: Cross multiply
    798.41x = 1,197.61 × 278.41
  4. Step 4: Simplify right side
    798.41x = 333,422.58
  5. Step 5: Solve for x
    x = 333,422.58/798.41
  6. Step 6: Final answer
    x = 417.61

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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.