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Finding the Fourth Proportional to 391,199.40, 586,831.56 and 124,997.76

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Solution

The fourth proportional to 391,199.40, 586,831.56 and 124,997.76 is: 187,507.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,199.40 : 586,831.56 = 124,997.76 : x
  2. Step 2: Convert to fraction form
    391,199.40/586,831.56 = 124,997.76/x
  3. Step 3: Cross multiply
    391,199.40x = 586,831.56 × 124,997.76
  4. Step 4: Simplify right side
    391,199.40x = 73,352,630,497.31
  5. Step 5: Solve for x
    x = 73,352,630,497.31/391,199.40
  6. Step 6: Final answer
    x = 187,507.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.