Home / 418,968.46-628,551.13-138,485.72

Finding the Fourth Proportional to 418,968.46, 628,551.13 and 138,485.72

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Solution

The fourth proportional to 418,968.46, 628,551.13 and 138,485.72 is: 207,761.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,968.46 : 628,551.13 = 138,485.72 : x
  2. Step 2: Convert to fraction form
    418,968.46/628,551.13 = 138,485.72/x
  3. Step 3: Cross multiply
    418,968.46x = 628,551.13 × 138,485.72
  4. Step 4: Simplify right side
    418,968.46x = 87,045,355,794.86
  5. Step 5: Solve for x
    x = 87,045,355,794.86/418,968.46
  6. Step 6: Final answer
    x = 207,761.12

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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.