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Finding the Fourth Proportional to 30.16, 45.26 and 28.13

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Solution

The fourth proportional to 30.16, 45.26 and 28.13 is: 42.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.16 : 45.26 = 28.13 : x
  2. Step 2: Convert to fraction form
    30.16/45.26 = 28.13/x
  3. Step 3: Cross multiply
    30.16x = 45.26 × 28.13
  4. Step 4: Simplify right side
    30.16x = 1,273.02
  5. Step 5: Solve for x
    x = 1,273.02/30.16
  6. Step 6: Final answer
    x = 42.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.