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Finding the Fourth Proportional to 278.88, 416.40 and 246.48

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Solution

The fourth proportional to 278.88, 416.40 and 246.48 is: 368.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.88 : 416.40 = 246.48 : x
  2. Step 2: Convert to fraction form
    278.88/416.40 = 246.48/x
  3. Step 3: Cross multiply
    278.88x = 416.40 × 246.48
  4. Step 4: Simplify right side
    278.88x = 102,634.27
  5. Step 5: Solve for x
    x = 102,634.27/278.88
  6. Step 6: Final answer
    x = 368.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.