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Finding the Fourth Proportional to 30.02, 44.80 and 25.70

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Solution

The fourth proportional to 30.02, 44.80 and 25.70 is: 38.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.02 : 44.80 = 25.70 : x
  2. Step 2: Convert to fraction form
    30.02/44.80 = 25.70/x
  3. Step 3: Cross multiply
    30.02x = 44.80 × 25.70
  4. Step 4: Simplify right side
    30.02x = 1,151.36
  5. Step 5: Solve for x
    x = 1,151.36/30.02
  6. Step 6: Final answer
    x = 38.35

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Why These Related Problems?

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