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Finding the Fourth Proportional to 305.65, 457.22 and 254.36

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Solution

The fourth proportional to 305.65, 457.22 and 254.36 is: 380.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.65 : 457.22 = 254.36 : x
  2. Step 2: Convert to fraction form
    305.65/457.22 = 254.36/x
  3. Step 3: Cross multiply
    305.65x = 457.22 × 254.36
  4. Step 4: Simplify right side
    305.65x = 116,300.26
  5. Step 5: Solve for x
    x = 116,300.26/305.65
  6. Step 6: Final answer
    x = 380.50

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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.