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Finding the Fourth Proportional to 351,436, 485,007.60 and 217,325.92

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Solution

The fourth proportional to 351,436, 485,007.60 and 217,325.92 is: 299,925.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,436 : 485,007.60 = 217,325.92 : x
  2. Step 2: Convert to fraction form
    351,436/485,007.60 = 217,325.92/x
  3. Step 3: Cross multiply
    351,436x = 485,007.60 × 217,325.92
  4. Step 4: Simplify right side
    351,436x = 105,404,722,876.99
  5. Step 5: Solve for x
    x = 105,404,722,876.99/351,436
  6. Step 6: Final answer
    x = 299,925.80

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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.