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Finding the Fourth Proportional to 448,404.36, 618,447.90 and 287,274.28

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Solution

The fourth proportional to 448,404.36, 618,447.90 and 287,274.28 is: 396,214.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,404.36 : 618,447.90 = 287,274.28 : x
  2. Step 2: Convert to fraction form
    448,404.36/618,447.90 = 287,274.28/x
  3. Step 3: Cross multiply
    448,404.36x = 618,447.90 × 287,274.28
  4. Step 4: Simplify right side
    448,404.36x = 177,664,175,190.01
  5. Step 5: Solve for x
    x = 177,664,175,190.01/448,404.36
  6. Step 6: Final answer
    x = 396,214.20

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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.