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Finding the Fourth Proportional to 681,148.22, 940,013.70 and 379,342.22

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Solution

The fourth proportional to 681,148.22, 940,013.70 and 379,342.22 is: 523,508.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,148.22 : 940,013.70 = 379,342.22 : x
  2. Step 2: Convert to fraction form
    681,148.22/940,013.70 = 379,342.22/x
  3. Step 3: Cross multiply
    681,148.22x = 940,013.70 × 379,342.22
  4. Step 4: Simplify right side
    681,148.22x = 356,586,883,788.41
  5. Step 5: Solve for x
    x = 356,586,883,788.41/681,148.22
  6. Step 6: Final answer
    x = 523,508.50

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Double scale
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Similar ratio
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1.5x scale

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.