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Finding the Fourth Proportional to 48.40, 72.53 and 31.26

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Solution

The fourth proportional to 48.40, 72.53 and 31.26 is: 46.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.40 : 72.53 = 31.26 : x
  2. Step 2: Convert to fraction form
    48.40/72.53 = 31.26/x
  3. Step 3: Cross multiply
    48.40x = 72.53 × 31.26
  4. Step 4: Simplify right side
    48.40x = 2,267.29
  5. Step 5: Solve for x
    x = 2,267.29/48.40
  6. Step 6: Final answer
    x = 46.84

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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.