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Finding the Fourth Proportional to 287,117.64, 396,221.94 and 159,790.20

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Solution

The fourth proportional to 287,117.64, 396,221.94 and 159,790.20 is: 220,510.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,117.64 : 396,221.94 = 159,790.20 : x
  2. Step 2: Convert to fraction form
    287,117.64/396,221.94 = 159,790.20/x
  3. Step 3: Cross multiply
    287,117.64x = 396,221.94 × 159,790.20
  4. Step 4: Simplify right side
    287,117.64x = 63,312,383,036.99
  5. Step 5: Solve for x
    x = 63,312,383,036.99/287,117.64
  6. Step 6: Final answer
    x = 220,510.25

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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.