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Finding the Fourth Proportional to 279.51, 417.36 and 253.95

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Solution

The fourth proportional to 279.51, 417.36 and 253.95 is: 379.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.51 : 417.36 = 253.95 : x
  2. Step 2: Convert to fraction form
    279.51/417.36 = 253.95/x
  3. Step 3: Cross multiply
    279.51x = 417.36 × 253.95
  4. Step 4: Simplify right side
    279.51x = 105,988.57
  5. Step 5: Solve for x
    x = 105,988.57/279.51
  6. Step 6: Final answer
    x = 379.19

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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.