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Finding the Fourth Proportional to 328,356.70, 492,498.60 and 91,723.30

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Solution

The fourth proportional to 328,356.70, 492,498.60 and 91,723.30 is: 137,574.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,356.70 : 492,498.60 = 91,723.30 : x
  2. Step 2: Convert to fraction form
    328,356.70/492,498.60 = 91,723.30/x
  3. Step 3: Cross multiply
    328,356.70x = 492,498.60 × 91,723.30
  4. Step 4: Simplify right side
    328,356.70x = 45,173,596,837.38
  5. Step 5: Solve for x
    x = 45,173,596,837.38/328,356.70
  6. Step 6: Final answer
    x = 137,574.77

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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.