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Finding the Fourth Proportional to 448,860.10, 618,866.67 and 287,449.78

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Solution

The fourth proportional to 448,860.10, 618,866.67 and 287,449.78 is: 396,321.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,860.10 : 618,866.67 = 287,449.78 : x
  2. Step 2: Convert to fraction form
    448,860.10/618,866.67 = 287,449.78/x
  3. Step 3: Cross multiply
    448,860.10x = 618,866.67 × 287,449.78
  4. Step 4: Simplify right side
    448,860.10x = 177,893,086,593.67
  5. Step 5: Solve for x
    x = 177,893,086,593.67/448,860.10
  6. Step 6: Final answer
    x = 396,321.90

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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.