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Finding the Fourth Proportional to 53.98, 74.28 and 50.02

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Solution

The fourth proportional to 53.98, 74.28 and 50.02 is: 68.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.98 : 74.28 = 50.02 : x
  2. Step 2: Convert to fraction form
    53.98/74.28 = 50.02/x
  3. Step 3: Cross multiply
    53.98x = 74.28 × 50.02
  4. Step 4: Simplify right side
    53.98x = 3,715.49
  5. Step 5: Solve for x
    x = 3,715.49/53.98
  6. Step 6: Final answer
    x = 68.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.