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Finding the Fourth Proportional to 288.19, 432.36 and 93.21

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Solution

The fourth proportional to 288.19, 432.36 and 93.21 is: 139.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.19 : 432.36 = 93.21 : x
  2. Step 2: Convert to fraction form
    288.19/432.36 = 93.21/x
  3. Step 3: Cross multiply
    288.19x = 432.36 × 93.21
  4. Step 4: Simplify right side
    288.19x = 40,298.65
  5. Step 5: Solve for x
    x = 40,298.65/288.19
  6. Step 6: Final answer
    x = 139.83

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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.