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Finding the Fourth Proportional to 30.07, 44.80 and 28

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Solution

The fourth proportional to 30.07, 44.80 and 28 is: 41.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.07 : 44.80 = 28 : x
  2. Step 2: Convert to fraction form
    30.07/44.80 = 28/x
  3. Step 3: Cross multiply
    30.07x = 44.80 × 28
  4. Step 4: Simplify right side
    30.07x = 1,254.40
  5. Step 5: Solve for x
    x = 1,254.40/30.07
  6. Step 6: Final answer
    x = 41.72

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.