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Finding the Fourth Proportional to 53.95, 74.45 and 44.72

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Solution

The fourth proportional to 53.95, 74.45 and 44.72 is: 61.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.95 : 74.45 = 44.72 : x
  2. Step 2: Convert to fraction form
    53.95/74.45 = 44.72/x
  3. Step 3: Cross multiply
    53.95x = 74.45 × 44.72
  4. Step 4: Simplify right side
    53.95x = 3,328.81
  5. Step 5: Solve for x
    x = 3,328.81/53.95
  6. Step 6: Final answer
    x = 61.70

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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.