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Finding the Fourth Proportional to 668,589.62, 922,429.28 and 381,906.72

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Solution

The fourth proportional to 668,589.62, 922,429.28 and 381,906.72 is: 526,903.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,589.62 : 922,429.28 = 381,906.72 : x
  2. Step 2: Convert to fraction form
    668,589.62/922,429.28 = 381,906.72/x
  3. Step 3: Cross multiply
    668,589.62x = 922,429.28 × 381,906.72
  4. Step 4: Simplify right side
    668,589.62x = 352,281,941,711.53
  5. Step 5: Solve for x
    x = 352,281,941,711.53/668,589.62
  6. Step 6: Final answer
    x = 526,903.10

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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.