Home / 398,914.11-552,830.41-391,344.39

Finding the Fourth Proportional to 398,914.11, 552,830.41 and 391,344.39

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Solution

The fourth proportional to 398,914.11, 552,830.41 and 391,344.39 is: 542,340.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,914.11 : 552,830.41 = 391,344.39 : x
  2. Step 2: Convert to fraction form
    398,914.11/552,830.41 = 391,344.39/x
  3. Step 3: Cross multiply
    398,914.11x = 552,830.41 × 391,344.39
  4. Step 4: Simplify right side
    398,914.11x = 216,347,079,574.90
  5. Step 5: Solve for x
    x = 216,347,079,574.90/398,914.11
  6. Step 6: Final answer
    x = 542,340.00

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.