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Finding the Fourth Proportional to 278.96, 416.43 and 242.51

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Solution

The fourth proportional to 278.96, 416.43 and 242.51 is: 362.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.96 : 416.43 = 242.51 : x
  2. Step 2: Convert to fraction form
    278.96/416.43 = 242.51/x
  3. Step 3: Cross multiply
    278.96x = 416.43 × 242.51
  4. Step 4: Simplify right side
    278.96x = 100,986.36
  5. Step 5: Solve for x
    x = 100,986.36/278.96
  6. Step 6: Final answer
    x = 362.02

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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.