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Finding the Fourth Proportional to 288.21, 432.38 and 93.23

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Solution

The fourth proportional to 288.21, 432.38 and 93.23 is: 139.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.21 : 432.38 = 93.23 : x
  2. Step 2: Convert to fraction form
    288.21/432.38 = 93.23/x
  3. Step 3: Cross multiply
    288.21x = 432.38 × 93.23
  4. Step 4: Simplify right side
    288.21x = 40,308.16
  5. Step 5: Solve for x
    x = 40,308.16/288.21
  6. Step 6: Final answer
    x = 139.86

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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.