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Finding the Fourth Proportional to 685,282.12, 945,696.80 and 379,363.61

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Solution

The fourth proportional to 685,282.12, 945,696.80 and 379,363.61 is: 523,525.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,282.12 : 945,696.80 = 379,363.61 : x
  2. Step 2: Convert to fraction form
    685,282.12/945,696.80 = 379,363.61/x
  3. Step 3: Cross multiply
    685,282.12x = 945,696.80 × 379,363.61
  4. Step 4: Simplify right side
    685,282.12x = 358,762,952,013.45
  5. Step 5: Solve for x
    x = 358,762,952,013.45/685,282.12
  6. Step 6: Final answer
    x = 523,525.92

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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.