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Finding the Fourth Proportional to 448,865.62, 618,874.26 and 287,455.30

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Solution

The fourth proportional to 448,865.62, 618,874.26 and 287,455.30 is: 396,329.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,865.62 : 618,874.26 = 287,455.30 : x
  2. Step 2: Convert to fraction form
    448,865.62/618,874.26 = 287,455.30/x
  3. Step 3: Cross multiply
    448,865.62x = 618,874.26 × 287,455.30
  4. Step 4: Simplify right side
    448,865.62x = 177,898,686,070.58
  5. Step 5: Solve for x
    x = 177,898,686,070.58/448,865.62
  6. Step 6: Final answer
    x = 396,329.50

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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.