Home / 621,557.82-857,439.27-392,399.10

Finding the Fourth Proportional to 621,557.82, 857,439.27 and 392,399.10

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Solution

The fourth proportional to 621,557.82, 857,439.27 and 392,399.10 is: 541,314.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,557.82 : 857,439.27 = 392,399.10 : x
  2. Step 2: Convert to fraction form
    621,557.82/857,439.27 = 392,399.10/x
  3. Step 3: Cross multiply
    621,557.82x = 857,439.27 × 392,399.10
  4. Step 4: Simplify right side
    621,557.82x = 336,458,397,852.66
  5. Step 5: Solve for x
    x = 336,458,397,852.66/621,557.82
  6. Step 6: Final answer
    x = 541,314.72

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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.