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Finding the Fourth Proportional to 685,008.65, 945,288.60 and 379,097.92

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Solution

The fourth proportional to 685,008.65, 945,288.60 and 379,097.92 is: 523,142.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,008.65 : 945,288.60 = 379,097.92 : x
  2. Step 2: Convert to fraction form
    685,008.65/945,288.60 = 379,097.92/x
  3. Step 3: Cross multiply
    685,008.65x = 945,288.60 × 379,097.92
  4. Step 4: Simplify right side
    685,008.65x = 358,356,945,018.34
  5. Step 5: Solve for x
    x = 358,356,945,018.34/685,008.65
  6. Step 6: Final answer
    x = 523,142.22

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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.