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Finding the Fourth Proportional to 418,718.76, 628,183.37 and 134,434.74

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Solution

The fourth proportional to 418,718.76, 628,183.37 and 134,434.74 is: 201,685.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,718.76 : 628,183.37 = 134,434.74 : x
  2. Step 2: Convert to fraction form
    418,718.76/628,183.37 = 134,434.74/x
  3. Step 3: Cross multiply
    418,718.76x = 628,183.37 × 134,434.74
  4. Step 4: Simplify right side
    418,718.76x = 84,449,668,018.27
  5. Step 5: Solve for x
    x = 84,449,668,018.27/418,718.76
  6. Step 6: Final answer
    x = 201,685.90

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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.