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Finding the Fourth Proportional to 644,081.28, 888,828.16 and 353,696.64

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Solution

The fourth proportional to 644,081.28, 888,828.16 and 353,696.64 is: 488,099.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,081.28 : 888,828.16 = 353,696.64 : x
  2. Step 2: Convert to fraction form
    644,081.28/888,828.16 = 353,696.64/x
  3. Step 3: Cross multiply
    644,081.28x = 888,828.16 × 353,696.64
  4. Step 4: Simplify right side
    644,081.28x = 314,375,533,729.38
  5. Step 5: Solve for x
    x = 314,375,533,729.38/644,081.28
  6. Step 6: Final answer
    x = 488,099.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.