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Finding the Fourth Proportional to 53.99, 74.43 and 38.46

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Solution

The fourth proportional to 53.99, 74.43 and 38.46 is: 53.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.99 : 74.43 = 38.46 : x
  2. Step 2: Convert to fraction form
    53.99/74.43 = 38.46/x
  3. Step 3: Cross multiply
    53.99x = 74.43 × 38.46
  4. Step 4: Simplify right side
    53.99x = 2,862.58
  5. Step 5: Solve for x
    x = 2,862.58/53.99
  6. Step 6: Final answer
    x = 53.03

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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.