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Finding the Fourth Proportional to 314,928.68, 472,474.46 and 90,305.55

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Solution

The fourth proportional to 314,928.68, 472,474.46 and 90,305.55 is: 135,481.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    314,928.68 : 472,474.46 = 90,305.55 : x
  2. Step 2: Convert to fraction form
    314,928.68/472,474.46 = 90,305.55/x
  3. Step 3: Cross multiply
    314,928.68x = 472,474.46 × 90,305.55
  4. Step 4: Simplify right side
    314,928.68x = 42,667,065,519.73
  5. Step 5: Solve for x
    x = 42,667,065,519.73/314,928.68
  6. Step 6: Final answer
    x = 135,481.68

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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.