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Finding the Fourth Proportional to 681,147.47, 940,012.67 and 379,341.47

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Solution

The fourth proportional to 681,147.47, 940,012.67 and 379,341.47 is: 523,507.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,147.47 : 940,012.67 = 379,341.47 : x
  2. Step 2: Convert to fraction form
    681,147.47/940,012.67 = 379,341.47/x
  3. Step 3: Cross multiply
    681,147.47x = 940,012.67 × 379,341.47
  4. Step 4: Simplify right side
    681,147.47x = 356,585,788,056.43
  5. Step 5: Solve for x
    x = 356,585,788,056.43/681,147.47
  6. Step 6: Final answer
    x = 523,507.47

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Double scale
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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.