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Finding the Fourth Proportional to 387,628.88, 581,689.56 and 200,640.38

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Solution

The fourth proportional to 387,628.88, 581,689.56 and 200,640.38 is: 301,088.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,628.88 : 581,689.56 = 200,640.38 : x
  2. Step 2: Convert to fraction form
    387,628.88/581,689.56 = 200,640.38/x
  3. Step 3: Cross multiply
    387,628.88x = 581,689.56 × 200,640.38
  4. Step 4: Simplify right side
    387,628.88x = 116,710,414,360.43
  5. Step 5: Solve for x
    x = 116,710,414,360.43/387,628.88
  6. Step 6: Final answer
    x = 301,088.03

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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.