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Finding the Fourth Proportional to 319,690.01, 479,530.83 and 91,991.57

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Solution

The fourth proportional to 319,690.01, 479,530.83 and 91,991.57 is: 137,986.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,690.01 : 479,530.83 = 91,991.57 : x
  2. Step 2: Convert to fraction form
    319,690.01/479,530.83 = 91,991.57/x
  3. Step 3: Cross multiply
    319,690.01x = 479,530.83 × 91,991.57
  4. Step 4: Simplify right side
    319,690.01x = 44,112,791,517.45
  5. Step 5: Solve for x
    x = 44,112,791,517.45/319,690.01
  6. Step 6: Final answer
    x = 137,986.15

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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.