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Finding the Fourth Proportional to 448.08, 618.28 and 282.39

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Solution

The fourth proportional to 448.08, 618.28 and 282.39 is: 389.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.08 : 618.28 = 282.39 : x
  2. Step 2: Convert to fraction form
    448.08/618.28 = 282.39/x
  3. Step 3: Cross multiply
    448.08x = 618.28 × 282.39
  4. Step 4: Simplify right side
    448.08x = 174,594.65
  5. Step 5: Solve for x
    x = 174,594.65/448.08
  6. Step 6: Final answer
    x = 389.65

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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.