Home / 621,723.52-857,901.28-392,193.80

Finding the Fourth Proportional to 621,723.52, 857,901.28 and 392,193.80

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Solution

The fourth proportional to 621,723.52, 857,901.28 and 392,193.80 is: 541,178.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,723.52 : 857,901.28 = 392,193.80 : x
  2. Step 2: Convert to fraction form
    621,723.52/857,901.28 = 392,193.80/x
  3. Step 3: Cross multiply
    621,723.52x = 857,901.28 × 392,193.80
  4. Step 4: Simplify right side
    621,723.52x = 336,463,563,028.06
  5. Step 5: Solve for x
    x = 336,463,563,028.06/621,723.52
  6. Step 6: Final answer
    x = 541,178.76

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Double scale
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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.