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Finding the Fourth Proportional to 681,631.64, 940,655.40 and 395,321.48

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Solution

The fourth proportional to 681,631.64, 940,655.40 and 395,321.48 is: 545,545.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,631.64 : 940,655.40 = 395,321.48 : x
  2. Step 2: Convert to fraction form
    681,631.64/940,655.40 = 395,321.48/x
  3. Step 3: Cross multiply
    681,631.64x = 940,655.40 × 395,321.48
  4. Step 4: Simplify right side
    681,631.64x = 371,861,284,897.99
  5. Step 5: Solve for x
    x = 371,861,284,897.99/681,631.64
  6. Step 6: Final answer
    x = 545,545.81

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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.