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Finding the Fourth Proportional to 684,859.55, 945,134.01 and 378,930.95

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Solution

The fourth proportional to 684,859.55, 945,134.01 and 378,930.95 is: 522,940.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,859.55 : 945,134.01 = 378,930.95 : x
  2. Step 2: Convert to fraction form
    684,859.55/945,134.01 = 378,930.95/x
  3. Step 3: Cross multiply
    684,859.55x = 945,134.01 × 378,930.95
  4. Step 4: Simplify right side
    684,859.55x = 358,140,523,560.94
  5. Step 5: Solve for x
    x = 358,140,523,560.94/684,859.55
  6. Step 6: Final answer
    x = 522,940.11

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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.