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Finding the Fourth Proportional to 948,673, 1,309,479.78 and 681,178.60

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Solution

The fourth proportional to 948,673, 1,309,479.78 and 681,178.60 is: 940,249.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    948,673 : 1,309,479.78 = 681,178.60 : x
  2. Step 2: Convert to fraction form
    948,673/1,309,479.78 = 681,178.60/x
  3. Step 3: Cross multiply
    948,673x = 1,309,479.78 × 681,178.60
  4. Step 4: Simplify right side
    948,673x = 891,989,603,268.71
  5. Step 5: Solve for x
    x = 891,989,603,268.71/948,673
  6. Step 6: Final answer
    x = 940,249.81

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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.