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Finding the Fourth Proportional to 448,410.75, 618,456.92 and 287,280.80

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Solution

The fourth proportional to 448,410.75, 618,456.92 and 287,280.80 is: 396,223.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,410.75 : 618,456.92 = 287,280.80 : x
  2. Step 2: Convert to fraction form
    448,410.75/618,456.92 = 287,280.80/x
  3. Step 3: Cross multiply
    448,410.75x = 618,456.92 × 287,280.80
  4. Step 4: Simplify right side
    448,410.75x = 177,670,796,369.05
  5. Step 5: Solve for x
    x = 177,670,796,369.05/448,410.75
  6. Step 6: Final answer
    x = 396,223.32

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1.5x scale

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.