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Finding the Fourth Proportional to 30.30, 41.55 and 30.18

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Solution

The fourth proportional to 30.30, 41.55 and 30.18 is: 41.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.30 : 41.55 = 30.18 : x
  2. Step 2: Convert to fraction form
    30.30/41.55 = 30.18/x
  3. Step 3: Cross multiply
    30.30x = 41.55 × 30.18
  4. Step 4: Simplify right side
    30.30x = 1,253.98
  5. Step 5: Solve for x
    x = 1,253.98/30.30
  6. Step 6: Final answer
    x = 41.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.