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Finding the Fourth Proportional to 47.04, 70.47 and 31.74

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Solution

The fourth proportional to 47.04, 70.47 and 31.74 is: 47.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.04 : 70.47 = 31.74 : x
  2. Step 2: Convert to fraction form
    47.04/70.47 = 31.74/x
  3. Step 3: Cross multiply
    47.04x = 70.47 × 31.74
  4. Step 4: Simplify right side
    47.04x = 2,236.72
  5. Step 5: Solve for x
    x = 2,236.72/47.04
  6. Step 6: Final answer
    x = 47.55

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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.