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Finding the Fourth Proportional to 53.70, 73.95 and 40.74

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Solution

The fourth proportional to 53.70, 73.95 and 40.74 is: 56.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.70 : 73.95 = 40.74 : x
  2. Step 2: Convert to fraction form
    53.70/73.95 = 40.74/x
  3. Step 3: Cross multiply
    53.70x = 73.95 × 40.74
  4. Step 4: Simplify right side
    53.70x = 3,012.72
  5. Step 5: Solve for x
    x = 3,012.72/53.70
  6. Step 6: Final answer
    x = 56.10

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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.