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Finding the Fourth Proportional to 287,076.80, 396,160.64 and 159,751.20

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Solution

The fourth proportional to 287,076.80, 396,160.64 and 159,751.20 is: 220,453.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,076.80 : 396,160.64 = 159,751.20 : x
  2. Step 2: Convert to fraction form
    287,076.80/396,160.64 = 159,751.20/x
  3. Step 3: Cross multiply
    287,076.80x = 396,160.64 × 159,751.20
  4. Step 4: Simplify right side
    287,076.80x = 63,287,137,632.77
  5. Step 5: Solve for x
    x = 63,287,137,632.77/287,076.80
  6. Step 6: Final answer
    x = 220,453.68

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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.