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Finding the Fourth Proportional to 335,815.20, 503,722.80 and 86,497.20

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Solution

The fourth proportional to 335,815.20, 503,722.80 and 86,497.20 is: 129,745.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    335,815.20 : 503,722.80 = 86,497.20 : x
  2. Step 2: Convert to fraction form
    335,815.20/503,722.80 = 86,497.20/x
  3. Step 3: Cross multiply
    335,815.20x = 503,722.80 × 86,497.20
  4. Step 4: Simplify right side
    335,815.20x = 43,570,611,776.16
  5. Step 5: Solve for x
    x = 43,570,611,776.16/335,815.20
  6. Step 6: Final answer
    x = 129,745.80

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.