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Finding the Fourth Proportional to 287,103.98, 396,199.60 and 159,779.58

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Solution

The fourth proportional to 287,103.98, 396,199.60 and 159,779.58 is: 220,493.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,103.98 : 396,199.60 = 159,779.58 : x
  2. Step 2: Convert to fraction form
    287,103.98/396,199.60 = 159,779.58/x
  3. Step 3: Cross multiply
    287,103.98x = 396,199.60 × 159,779.58
  4. Step 4: Simplify right side
    287,103.98x = 63,304,605,684.17
  5. Step 5: Solve for x
    x = 63,304,605,684.17/287,103.98
  6. Step 6: Final answer
    x = 220,493.65

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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.