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Finding the Fourth Proportional to 291.81, 437.60 and 118.47

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Solution

The fourth proportional to 291.81, 437.60 and 118.47 is: 177.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.81 : 437.60 = 118.47 : x
  2. Step 2: Convert to fraction form
    291.81/437.60 = 118.47/x
  3. Step 3: Cross multiply
    291.81x = 437.60 × 118.47
  4. Step 4: Simplify right side
    291.81x = 51,842.47
  5. Step 5: Solve for x
    x = 51,842.47/291.81
  6. Step 6: Final answer
    x = 177.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.