Home / 621,830.36-858,049.60-392,301.08

Finding the Fourth Proportional to 621,830.36, 858,049.60 and 392,301.08

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Solution

The fourth proportional to 621,830.36, 858,049.60 and 392,301.08 is: 541,327.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,830.36 : 858,049.60 = 392,301.08 : x
  2. Step 2: Convert to fraction form
    621,830.36/858,049.60 = 392,301.08/x
  3. Step 3: Cross multiply
    621,830.36x = 858,049.60 × 392,301.08
  4. Step 4: Simplify right side
    621,830.36x = 336,613,784,773.57
  5. Step 5: Solve for x
    x = 336,613,784,773.57/621,830.36
  6. Step 6: Final answer
    x = 541,327.36

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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.