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Finding the Fourth Proportional to 687,338.66, 948,549.11 and 396,944.97

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Solution

The fourth proportional to 687,338.66, 948,549.11 and 396,944.97 is: 547,796.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,338.66 : 948,549.11 = 396,944.97 : x
  2. Step 2: Convert to fraction form
    687,338.66/948,549.11 = 396,944.97/x
  3. Step 3: Cross multiply
    687,338.66x = 948,549.11 × 396,944.97
  4. Step 4: Simplify right side
    687,338.66x = 376,521,799,584.81
  5. Step 5: Solve for x
    x = 376,521,799,584.81/687,338.66
  6. Step 6: Final answer
    x = 547,796.63

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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.