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Finding the Fourth Proportional to 668,864.64, 922,972.24 and 396,885.66

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Solution

The fourth proportional to 668,864.64, 922,972.24 and 396,885.66 is: 547,666.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,864.64 : 922,972.24 = 396,885.66 : x
  2. Step 2: Convert to fraction form
    668,864.64/922,972.24 = 396,885.66/x
  3. Step 3: Cross multiply
    668,864.64x = 922,972.24 × 396,885.66
  4. Step 4: Simplify right side
    668,864.64x = 366,314,446,634.08
  5. Step 5: Solve for x
    x = 366,314,446,634.08/668,864.64
  6. Step 6: Final answer
    x = 547,666.04

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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.