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Finding the Fourth Proportional to 288.31, 432.51 and 93.31

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Solution

The fourth proportional to 288.31, 432.51 and 93.31 is: 139.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.31 : 432.51 = 93.31 : x
  2. Step 2: Convert to fraction form
    288.31/432.51 = 93.31/x
  3. Step 3: Cross multiply
    288.31x = 432.51 × 93.31
  4. Step 4: Simplify right side
    288.31x = 40,357.51
  5. Step 5: Solve for x
    x = 40,357.51/288.31
  6. Step 6: Final answer
    x = 139.98

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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.