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Finding the Fourth Proportional to 448.80, 618.19 and 317.58

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Solution

The fourth proportional to 448.80, 618.19 and 317.58 is: 437.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.80 : 618.19 = 317.58 : x
  2. Step 2: Convert to fraction form
    448.80/618.19 = 317.58/x
  3. Step 3: Cross multiply
    448.80x = 618.19 × 317.58
  4. Step 4: Simplify right side
    448.80x = 196,324.78
  5. Step 5: Solve for x
    x = 196,324.78/448.80
  6. Step 6: Final answer
    x = 437.44

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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.