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Finding the Fourth Proportional to 31.58, 46.98 and 30.63

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Solution

The fourth proportional to 31.58, 46.98 and 30.63 is: 45.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    31.58 : 46.98 = 30.63 : x
  2. Step 2: Convert to fraction form
    31.58/46.98 = 30.63/x
  3. Step 3: Cross multiply
    31.58x = 46.98 × 30.63
  4. Step 4: Simplify right side
    31.58x = 1,439.00
  5. Step 5: Solve for x
    x = 1,439.00/31.58
  6. Step 6: Final answer
    x = 45.57

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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.