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Finding the Fourth Proportional to 386,661.72, 579,853.08 and 133,873.68

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Solution

The fourth proportional to 386,661.72, 579,853.08 and 133,873.68 is: 200,762.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,661.72 : 579,853.08 = 133,873.68 : x
  2. Step 2: Convert to fraction form
    386,661.72/579,853.08 = 133,873.68/x
  3. Step 3: Cross multiply
    386,661.72x = 579,853.08 × 133,873.68
  4. Step 4: Simplify right side
    386,661.72x = 77,627,065,678.93
  5. Step 5: Solve for x
    x = 77,627,065,678.93/386,661.72
  6. Step 6: Final answer
    x = 200,762.22

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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.