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Finding the Fourth Proportional to 622,694.94, 858,639.51 and 421,141.02

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Solution

The fourth proportional to 622,694.94, 858,639.51 and 421,141.02 is: 580,715.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,694.94 : 858,639.51 = 421,141.02 : x
  2. Step 2: Convert to fraction form
    622,694.94/858,639.51 = 421,141.02/x
  3. Step 3: Cross multiply
    622,694.94x = 858,639.51 × 421,141.02
  4. Step 4: Simplify right side
    622,694.94x = 361,608,319,053.70
  5. Step 5: Solve for x
    x = 361,608,319,053.70/622,694.94
  6. Step 6: Final answer
    x = 580,715.04

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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.