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Finding the Fourth Proportional to 418,898.40, 628,371.90 and 119,400.90

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Solution

The fourth proportional to 418,898.40, 628,371.90 and 119,400.90 is: 179,108.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,898.40 : 628,371.90 = 119,400.90 : x
  2. Step 2: Convert to fraction form
    418,898.40/628,371.90 = 119,400.90/x
  3. Step 3: Cross multiply
    418,898.40x = 628,371.90 × 119,400.90
  4. Step 4: Simplify right side
    418,898.40x = 75,028,170,394.71
  5. Step 5: Solve for x
    x = 75,028,170,394.71/418,898.40
  6. Step 6: Final answer
    x = 179,108.28

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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.