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Finding the Fourth Proportional to 48.45, 66.62 and 47.01

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Solution

The fourth proportional to 48.45, 66.62 and 47.01 is: 64.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.45 : 66.62 = 47.01 : x
  2. Step 2: Convert to fraction form
    48.45/66.62 = 47.01/x
  3. Step 3: Cross multiply
    48.45x = 66.62 × 47.01
  4. Step 4: Simplify right side
    48.45x = 3,131.57
  5. Step 5: Solve for x
    x = 3,131.57/48.45
  6. Step 6: Final answer
    x = 64.64

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.