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Finding the Fourth Proportional to 418,917.18, 628,281.09 and 119,391.33

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Solution

The fourth proportional to 418,917.18, 628,281.09 and 119,391.33 is: 179,060.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,917.18 : 628,281.09 = 119,391.33 : x
  2. Step 2: Convert to fraction form
    418,917.18/628,281.09 = 119,391.33/x
  3. Step 3: Cross multiply
    418,917.18x = 628,281.09 × 119,391.33
  4. Step 4: Simplify right side
    418,917.18x = 75,011,314,948.95
  5. Step 5: Solve for x
    x = 75,011,314,948.95/418,917.18
  6. Step 6: Final answer
    x = 179,060.01

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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.