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Finding the Fourth Proportional to 291.84, 437.58 and 99.42

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Solution

The fourth proportional to 291.84, 437.58 and 99.42 is: 149.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.84 : 437.58 = 99.42 : x
  2. Step 2: Convert to fraction form
    291.84/437.58 = 99.42/x
  3. Step 3: Cross multiply
    291.84x = 437.58 × 99.42
  4. Step 4: Simplify right side
    291.84x = 43,504.20
  5. Step 5: Solve for x
    x = 43,504.20/291.84
  6. Step 6: Final answer
    x = 149.07

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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.