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Finding the Fourth Proportional to 386,585.92, 579,918.69 and 133,865.92

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Solution

The fourth proportional to 386,585.92, 579,918.69 and 133,865.92 is: 200,812.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,585.92 : 579,918.69 = 133,865.92 : x
  2. Step 2: Convert to fraction form
    386,585.92/579,918.69 = 133,865.92/x
  3. Step 3: Cross multiply
    386,585.92x = 579,918.69 × 133,865.92
  4. Step 4: Simplify right side
    386,585.92x = 77,631,348,962.04
  5. Step 5: Solve for x
    x = 77,631,348,962.04/386,585.92
  6. Step 6: Final answer
    x = 200,812.67

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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.