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Finding the Fourth Proportional to 668,375.68, 922,331.20 and 399,944.32

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Solution

The fourth proportional to 668,375.68, 922,331.20 and 399,944.32 is: 551,906.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,375.68 : 922,331.20 = 399,944.32 : x
  2. Step 2: Convert to fraction form
    668,375.68/922,331.20 = 399,944.32/x
  3. Step 3: Cross multiply
    668,375.68x = 922,331.20 × 399,944.32
  4. Step 4: Simplify right side
    668,375.68x = 368,881,124,598.78
  5. Step 5: Solve for x
    x = 368,881,124,598.78/668,375.68
  6. Step 6: Final answer
    x = 551,906.86

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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.