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Finding the Fourth Proportional to 668,320.68, 922,331.42 and 381,834.61

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Solution

The fourth proportional to 668,320.68, 922,331.42 and 381,834.61 is: 526,959.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,320.68 : 922,331.42 = 381,834.61 : x
  2. Step 2: Convert to fraction form
    668,320.68/922,331.42 = 381,834.61/x
  3. Step 3: Cross multiply
    668,320.68x = 922,331.42 × 381,834.61
  4. Step 4: Simplify right side
    668,320.68x = 352,178,056,137.27
  5. Step 5: Solve for x
    x = 352,178,056,137.27/668,320.68
  6. Step 6: Final answer
    x = 526,959.69

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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.