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Finding the Fourth Proportional to 418,719.76, 628,184.87 and 134,435.74

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Solution

The fourth proportional to 418,719.76, 628,184.87 and 134,435.74 is: 201,687.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,719.76 : 628,184.87 = 134,435.74 : x
  2. Step 2: Convert to fraction form
    418,719.76/628,184.87 = 134,435.74/x
  3. Step 3: Cross multiply
    418,719.76x = 628,184.87 × 134,435.74
  4. Step 4: Simplify right side
    418,719.76x = 84,450,497,855.25
  5. Step 5: Solve for x
    x = 84,450,497,855.25/418,719.76
  6. Step 6: Final answer
    x = 201,687.40

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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.