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Finding the Fourth Proportional to 288.36, 432.66 and 166.72

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Solution

The fourth proportional to 288.36, 432.66 and 166.72 is: 250.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.36 : 432.66 = 166.72 : x
  2. Step 2: Convert to fraction form
    288.36/432.66 = 166.72/x
  3. Step 3: Cross multiply
    288.36x = 432.66 × 166.72
  4. Step 4: Simplify right side
    288.36x = 72,133.08
  5. Step 5: Solve for x
    x = 72,133.08/288.36
  6. Step 6: Final answer
    x = 250.15

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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.