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Finding the Fourth Proportional to 668,455.02, 922,585.86 and 396,672.78

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Solution

The fourth proportional to 668,455.02, 922,585.86 and 396,672.78 is: 547,478.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,455.02 : 922,585.86 = 396,672.78 : x
  2. Step 2: Convert to fraction form
    668,455.02/922,585.86 = 396,672.78/x
  3. Step 3: Cross multiply
    668,455.02x = 922,585.86 × 396,672.78
  4. Step 4: Simplify right side
    668,455.02x = 365,964,697,874.89
  5. Step 5: Solve for x
    x = 365,964,697,874.89/668,455.02
  6. Step 6: Final answer
    x = 547,478.42

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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.