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Finding the Fourth Proportional to 386,039.04, 579,135.96 and 133,328.80

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Solution

The fourth proportional to 386,039.04, 579,135.96 and 133,328.80 is: 200,019.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,039.04 : 579,135.96 = 133,328.80 : x
  2. Step 2: Convert to fraction form
    386,039.04/579,135.96 = 133,328.80/x
  3. Step 3: Cross multiply
    386,039.04x = 579,135.96 × 133,328.80
  4. Step 4: Simplify right side
    386,039.04x = 77,215,502,583.65
  5. Step 5: Solve for x
    x = 77,215,502,583.65/386,039.04
  6. Step 6: Final answer
    x = 200,019.93

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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.