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Finding the Fourth Proportional to 259.93, 392.13 and 247.11

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Solution

The fourth proportional to 259.93, 392.13 and 247.11 is: 372.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.93 : 392.13 = 247.11 : x
  2. Step 2: Convert to fraction form
    259.93/392.13 = 247.11/x
  3. Step 3: Cross multiply
    259.93x = 392.13 × 247.11
  4. Step 4: Simplify right side
    259.93x = 96,899.24
  5. Step 5: Solve for x
    x = 96,899.24/259.93
  6. Step 6: Final answer
    x = 372.79

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.