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Finding the Fourth Proportional to 485.40, 726.66 and 302.22

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Solution

The fourth proportional to 485.40, 726.66 and 302.22 is: 452.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.40 : 726.66 = 302.22 : x
  2. Step 2: Convert to fraction form
    485.40/726.66 = 302.22/x
  3. Step 3: Cross multiply
    485.40x = 726.66 × 302.22
  4. Step 4: Simplify right side
    485.40x = 219,611.19
  5. Step 5: Solve for x
    x = 219,611.19/485.40
  6. Step 6: Final answer
    x = 452.43

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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.