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Finding the Fourth Proportional to 448,665.50, 618,808.28 and 287,535.44

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Solution

The fourth proportional to 448,665.50, 618,808.28 and 287,535.44 is: 396,574.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,665.50 : 618,808.28 = 287,535.44 : x
  2. Step 2: Convert to fraction form
    448,665.50/618,808.28 = 287,535.44/x
  3. Step 3: Cross multiply
    448,665.50x = 618,808.28 × 287,535.44
  4. Step 4: Simplify right side
    448,665.50x = 177,929,311,174.79
  5. Step 5: Solve for x
    x = 177,929,311,174.79/448,665.50
  6. Step 6: Final answer
    x = 396,574.53

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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.