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Finding the Fourth Proportional to 40.70, 53.76 and 40.70

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Solution

The fourth proportional to 40.70, 53.76 and 40.70 is: 53.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.70 : 53.76 = 40.70 : x
  2. Step 2: Convert to fraction form
    40.70/53.76 = 40.70/x
  3. Step 3: Cross multiply
    40.70x = 53.76 × 40.70
  4. Step 4: Simplify right side
    40.70x = 2,188.03
  5. Step 5: Solve for x
    x = 2,188.03/40.70
  6. Step 6: Final answer
    x = 53.76

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.