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Finding the Fourth Proportional to 291.38, 435.18 and 247.58

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Solution

The fourth proportional to 291.38, 435.18 and 247.58 is: 369.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.38 : 435.18 = 247.58 : x
  2. Step 2: Convert to fraction form
    291.38/435.18 = 247.58/x
  3. Step 3: Cross multiply
    291.38x = 435.18 × 247.58
  4. Step 4: Simplify right side
    291.38x = 107,742.95
  5. Step 5: Solve for x
    x = 107,742.95/291.38
  6. Step 6: Final answer
    x = 369.77

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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.