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Finding the Fourth Proportional to 53.37, 79.65 and 49.91

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Solution

The fourth proportional to 53.37, 79.65 and 49.91 is: 74.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.37 : 79.65 = 49.91 : x
  2. Step 2: Convert to fraction form
    53.37/79.65 = 49.91/x
  3. Step 3: Cross multiply
    53.37x = 79.65 × 49.91
  4. Step 4: Simplify right side
    53.37x = 3,974.93
  5. Step 5: Solve for x
    x = 3,974.93/53.37
  6. Step 6: Final answer
    x = 74.48

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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.