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Finding the Fourth Proportional to 305.49, 457.80 and 151.20

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Solution

The fourth proportional to 305.49, 457.80 and 151.20 is: 226.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.49 : 457.80 = 151.20 : x
  2. Step 2: Convert to fraction form
    305.49/457.80 = 151.20/x
  3. Step 3: Cross multiply
    305.49x = 457.80 × 151.20
  4. Step 4: Simplify right side
    305.49x = 69,219.36
  5. Step 5: Solve for x
    x = 69,219.36/305.49
  6. Step 6: Final answer
    x = 226.58

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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.