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Finding the Fourth Proportional to 448.40, 618.60 and 292.88

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Solution

The fourth proportional to 448.40, 618.60 and 292.88 is: 404.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.40 : 618.60 = 292.88 : x
  2. Step 2: Convert to fraction form
    448.40/618.60 = 292.88/x
  3. Step 3: Cross multiply
    448.40x = 618.60 × 292.88
  4. Step 4: Simplify right side
    448.40x = 181,175.57
  5. Step 5: Solve for x
    x = 181,175.57/448.40
  6. Step 6: Final answer
    x = 404.05

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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.