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Finding the Fourth Proportional to 288.02, 431.99 and 158.08

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Solution

The fourth proportional to 288.02, 431.99 and 158.08 is: 237.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.02 : 431.99 = 158.08 : x
  2. Step 2: Convert to fraction form
    288.02/431.99 = 158.08/x
  3. Step 3: Cross multiply
    288.02x = 431.99 × 158.08
  4. Step 4: Simplify right side
    288.02x = 68,289.27
  5. Step 5: Solve for x
    x = 68,289.27/288.02
  6. Step 6: Final answer
    x = 237.10

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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.