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Finding the Fourth Proportional to 668,462.42, 922,479.66 and 381,981.82

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Solution

The fourth proportional to 668,462.42, 922,479.66 and 381,981.82 is: 527,135.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,462.42 : 922,479.66 = 381,981.82 : x
  2. Step 2: Convert to fraction form
    668,462.42/922,479.66 = 381,981.82/x
  3. Step 3: Cross multiply
    668,462.42x = 922,479.66 × 381,981.82
  4. Step 4: Simplify right side
    668,462.42x = 352,370,459,439.78
  5. Step 5: Solve for x
    x = 352,370,459,439.78/668,462.42
  6. Step 6: Final answer
    x = 527,135.78

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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.