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Finding the Fourth Proportional to 448,638.60, 618,771.19 and 287,508.63

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Solution

The fourth proportional to 448,638.60, 618,771.19 and 287,508.63 is: 396,537.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,638.60 : 618,771.19 = 287,508.63 : x
  2. Step 2: Convert to fraction form
    448,638.60/618,771.19 = 287,508.63/x
  3. Step 3: Cross multiply
    448,638.60x = 618,771.19 × 287,508.63
  4. Step 4: Simplify right side
    448,638.60x = 177,902,057,120.37
  5. Step 5: Solve for x
    x = 177,902,057,120.37/448,638.60
  6. Step 6: Final answer
    x = 396,537.56

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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.