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Finding the Fourth Proportional to 668,462.17, 922,479.32 and 381,981.57

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Solution

The fourth proportional to 668,462.17, 922,479.32 and 381,981.57 is: 527,135.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,462.17 : 922,479.32 = 381,981.57 : x
  2. Step 2: Convert to fraction form
    668,462.17/922,479.32 = 381,981.57/x
  3. Step 3: Cross multiply
    668,462.17x = 922,479.32 × 381,981.57
  4. Step 4: Simplify right side
    668,462.17x = 352,370,098,946.13
  5. Step 5: Solve for x
    x = 352,370,098,946.13/668,462.17
  6. Step 6: Final answer
    x = 527,135.44

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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.