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Finding the Fourth Proportional to 287,312.67, 396,494.60 and 159,990.39

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Solution

The fourth proportional to 287,312.67, 396,494.60 and 159,990.39 is: 220,788.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,312.67 : 396,494.60 = 159,990.39 : x
  2. Step 2: Convert to fraction form
    287,312.67/396,494.60 = 159,990.39/x
  3. Step 3: Cross multiply
    287,312.67x = 396,494.60 × 159,990.39
  4. Step 4: Simplify right side
    287,312.67x = 63,435,324,886.94
  5. Step 5: Solve for x
    x = 63,435,324,886.94/287,312.67
  6. Step 6: Final answer
    x = 220,788.47

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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.