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Finding the Fourth Proportional to 448.38, 618.90 and 282.59

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Solution

The fourth proportional to 448.38, 618.90 and 282.59 is: 390.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.38 : 618.90 = 282.59 : x
  2. Step 2: Convert to fraction form
    448.38/618.90 = 282.59/x
  3. Step 3: Cross multiply
    448.38x = 618.90 × 282.59
  4. Step 4: Simplify right side
    448.38x = 174,891.86
  5. Step 5: Solve for x
    x = 174,891.86/448.38
  6. Step 6: Final answer
    x = 390.05

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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.