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Finding the Fourth Proportional to 448.18, 617.95 and 316.96

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Solution

The fourth proportional to 448.18, 617.95 and 316.96 is: 437.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.18 : 617.95 = 316.96 : x
  2. Step 2: Convert to fraction form
    448.18/617.95 = 316.96/x
  3. Step 3: Cross multiply
    448.18x = 617.95 × 316.96
  4. Step 4: Simplify right side
    448.18x = 195,863.09
  5. Step 5: Solve for x
    x = 195,863.09/448.18
  6. Step 6: Final answer
    x = 437.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.