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Finding the Fourth Proportional to 448,856.91, 618,862.28 and 287,446.59

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Solution

The fourth proportional to 448,856.91, 618,862.28 and 287,446.59 is: 396,317.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,856.91 : 618,862.28 = 287,446.59 : x
  2. Step 2: Convert to fraction form
    448,856.91/618,862.28 = 287,446.59/x
  3. Step 3: Cross multiply
    448,856.91x = 618,862.28 × 287,446.59
  4. Step 4: Simplify right side
    448,856.91x = 177,889,850,628.39
  5. Step 5: Solve for x
    x = 177,889,850,628.39/448,856.91
  6. Step 6: Final answer
    x = 396,317.50

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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.