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Finding the Fourth Proportional to 668,781.30, 922,739.64 and 396,622.92

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Solution

The fourth proportional to 668,781.30, 922,739.64 and 396,622.92 is: 547,233.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,781.30 : 922,739.64 = 396,622.92 : x
  2. Step 2: Convert to fraction form
    668,781.30/922,739.64 = 396,622.92/x
  3. Step 3: Cross multiply
    668,781.30x = 922,739.64 × 396,622.92
  4. Step 4: Simplify right side
    668,781.30x = 365,979,690,416.55
  5. Step 5: Solve for x
    x = 365,979,690,416.55/668,781.30
  6. Step 6: Final answer
    x = 547,233.74

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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.