Home / 287,113.95-396,213.32-159,789.58

Finding the Fourth Proportional to 287,113.95, 396,213.32 and 159,789.58

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Solution

The fourth proportional to 287,113.95, 396,213.32 and 159,789.58 is: 220,507.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,113.95 : 396,213.32 = 159,789.58 : x
  2. Step 2: Convert to fraction form
    287,113.95/396,213.32 = 159,789.58/x
  3. Step 3: Cross multiply
    287,113.95x = 396,213.32 × 159,789.58
  4. Step 4: Simplify right side
    287,113.95x = 63,310,759,402.15
  5. Step 5: Solve for x
    x = 63,310,759,402.15/287,113.95
  6. Step 6: Final answer
    x = 220,507.43

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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.