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Finding the Fourth Proportional to 32.30, 48.15 and 31.59

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Solution

The fourth proportional to 32.30, 48.15 and 31.59 is: 47.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    32.30 : 48.15 = 31.59 : x
  2. Step 2: Convert to fraction form
    32.30/48.15 = 31.59/x
  3. Step 3: Cross multiply
    32.30x = 48.15 × 31.59
  4. Step 4: Simplify right side
    32.30x = 1,521.06
  5. Step 5: Solve for x
    x = 1,521.06/32.30
  6. Step 6: Final answer
    x = 47.09

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.