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Finding the Fourth Proportional to 278.51, 384.51 and 193.49

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Solution

The fourth proportional to 278.51, 384.51 and 193.49 is: 267.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.51 : 384.51 = 193.49 : x
  2. Step 2: Convert to fraction form
    278.51/384.51 = 193.49/x
  3. Step 3: Cross multiply
    278.51x = 384.51 × 193.49
  4. Step 4: Simplify right side
    278.51x = 74,398.36
  5. Step 5: Solve for x
    x = 74,398.36/278.51
  6. Step 6: Final answer
    x = 267.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.