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Finding the Fourth Proportional to 448,616.29, 618,740.44 and 287,486.33

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Solution

The fourth proportional to 448,616.29, 618,740.44 and 287,486.33 is: 396,506.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,616.29 : 618,740.44 = 287,486.33 : x
  2. Step 2: Convert to fraction form
    448,616.29/618,740.44 = 287,486.33/x
  3. Step 3: Cross multiply
    448,616.29x = 618,740.44 × 287,486.33
  4. Step 4: Simplify right side
    448,616.29x = 177,879,418,318.19
  5. Step 5: Solve for x
    x = 177,879,418,318.19/448,616.29
  6. Step 6: Final answer
    x = 396,506.82

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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.