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Finding the Fourth Proportional to 678,988.46, 936,614.22 and 423,896.78

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Solution

The fourth proportional to 678,988.46, 936,614.22 and 423,896.78 is: 584,734.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,988.46 : 936,614.22 = 423,896.78 : x
  2. Step 2: Convert to fraction form
    678,988.46/936,614.22 = 423,896.78/x
  3. Step 3: Cross multiply
    678,988.46x = 936,614.22 × 423,896.78
  4. Step 4: Simplify right side
    678,988.46x = 397,027,751,960.21
  5. Step 5: Solve for x
    x = 397,027,751,960.21/678,988.46
  6. Step 6: Final answer
    x = 584,734.17

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1.5x scale

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.