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Finding the Fourth Proportional to 407.88, 613.05 and 310.68

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Solution

The fourth proportional to 407.88, 613.05 and 310.68 is: 466.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.88 : 613.05 = 310.68 : x
  2. Step 2: Convert to fraction form
    407.88/613.05 = 310.68/x
  3. Step 3: Cross multiply
    407.88x = 613.05 × 310.68
  4. Step 4: Simplify right side
    407.88x = 190,462.37
  5. Step 5: Solve for x
    x = 190,462.37/407.88
  6. Step 6: Final answer
    x = 466.96

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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.