Home / 621,123.39-857,145.11-349,192.49

Finding the Fourth Proportional to 621,123.39, 857,145.11 and 349,192.49

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Solution

The fourth proportional to 621,123.39, 857,145.11 and 349,192.49 is: 481,882.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,123.39 : 857,145.11 = 349,192.49 : x
  2. Step 2: Convert to fraction form
    621,123.39/857,145.11 = 349,192.49/x
  3. Step 3: Cross multiply
    621,123.39x = 857,145.11 × 349,192.49
  4. Step 4: Simplify right side
    621,123.39x = 299,308,629,220.54
  5. Step 5: Solve for x
    x = 299,308,629,220.54/621,123.39
  6. Step 6: Final answer
    x = 481,882.72

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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.