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Finding the Fourth Proportional to 685,281.12, 945,695.42 and 379,362.61

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Solution

The fourth proportional to 685,281.12, 945,695.42 and 379,362.61 is: 523,524.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,281.12 : 945,695.42 = 379,362.61 : x
  2. Step 2: Convert to fraction form
    685,281.12/945,695.42 = 379,362.61/x
  3. Step 3: Cross multiply
    685,281.12x = 945,695.42 × 379,362.61
  4. Step 4: Simplify right side
    685,281.12x = 358,761,480,899.43
  5. Step 5: Solve for x
    x = 358,761,480,899.43/685,281.12
  6. Step 6: Final answer
    x = 523,524.54

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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.