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Finding the Fourth Proportional to 328,145.82, 492,246.48 and 91,488.70

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Solution

The fourth proportional to 328,145.82, 492,246.48 and 91,488.70 is: 137,240.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,145.82 : 492,246.48 = 91,488.70 : x
  2. Step 2: Convert to fraction form
    328,145.82/492,246.48 = 91,488.70/x
  3. Step 3: Cross multiply
    328,145.82x = 492,246.48 × 91,488.70
  4. Step 4: Simplify right side
    328,145.82x = 45,034,990,534.78
  5. Step 5: Solve for x
    x = 45,034,990,534.78/328,145.82
  6. Step 6: Final answer
    x = 137,240.79

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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.