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Finding the Fourth Proportional to 418,718.08, 628,065.36 and 134,406.40

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Solution

The fourth proportional to 418,718.08, 628,065.36 and 134,406.40 is: 201,605.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,718.08 : 628,065.36 = 134,406.40 : x
  2. Step 2: Convert to fraction form
    418,718.08/628,065.36 = 134,406.40/x
  3. Step 3: Cross multiply
    418,718.08x = 628,065.36 × 134,406.40
  4. Step 4: Simplify right side
    418,718.08x = 84,416,004,002.30
  5. Step 5: Solve for x
    x = 84,416,004,002.30/418,718.08
  6. Step 6: Final answer
    x = 201,605.83

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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.