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Finding the Fourth Proportional to 291.81, 401.59 and 247.39

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Solution

The fourth proportional to 291.81, 401.59 and 247.39 is: 340.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.81 : 401.59 = 247.39 : x
  2. Step 2: Convert to fraction form
    291.81/401.59 = 247.39/x
  3. Step 3: Cross multiply
    291.81x = 401.59 × 247.39
  4. Step 4: Simplify right side
    291.81x = 99,348.66
  5. Step 5: Solve for x
    x = 99,348.66/291.81
  6. Step 6: Final answer
    x = 340.45

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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.