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Finding the Fourth Proportional to 287,297.28, 396,476.64 and 159,984.72

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Solution

The fourth proportional to 287,297.28, 396,476.64 and 159,984.72 is: 220,782.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,297.28 : 396,476.64 = 159,984.72 : x
  2. Step 2: Convert to fraction form
    287,297.28/396,476.64 = 159,984.72/x
  3. Step 3: Cross multiply
    287,297.28x = 396,476.64 × 159,984.72
  4. Step 4: Simplify right side
    287,297.28x = 63,430,204,236.94
  5. Step 5: Solve for x
    x = 63,430,204,236.94/287,297.28
  6. Step 6: Final answer
    x = 220,782.47

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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.