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Finding the Fourth Proportional to 53.86, 74.34 and 38.32

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Solution

The fourth proportional to 53.86, 74.34 and 38.32 is: 52.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.86 : 74.34 = 38.32 : x
  2. Step 2: Convert to fraction form
    53.86/74.34 = 38.32/x
  3. Step 3: Cross multiply
    53.86x = 74.34 × 38.32
  4. Step 4: Simplify right side
    53.86x = 2,848.71
  5. Step 5: Solve for x
    x = 2,848.71/53.86
  6. Step 6: Final answer
    x = 52.89

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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.