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Finding the Fourth Proportional to 448,859.60, 618,865.98 and 287,449.28

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Solution

The fourth proportional to 448,859.60, 618,865.98 and 287,449.28 is: 396,321.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,859.60 : 618,865.98 = 287,449.28 : x
  2. Step 2: Convert to fraction form
    448,859.60/618,865.98 = 287,449.28/x
  3. Step 3: Cross multiply
    448,859.60x = 618,865.98 × 287,449.28
  4. Step 4: Simplify right side
    448,859.60x = 177,892,580,367.49
  5. Step 5: Solve for x
    x = 177,892,580,367.49/448,859.60
  6. Step 6: Final answer
    x = 396,321.21

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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.