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Finding the Fourth Proportional to 418,990.68, 628,104.78 and 152,690.49

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Solution

The fourth proportional to 418,990.68, 628,104.78 and 152,690.49 is: 228,896.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,990.68 : 628,104.78 = 152,690.49 : x
  2. Step 2: Convert to fraction form
    418,990.68/628,104.78 = 152,690.49/x
  3. Step 3: Cross multiply
    418,990.68x = 628,104.78 × 152,690.49
  4. Step 4: Simplify right side
    418,990.68x = 95,905,626,629.54
  5. Step 5: Solve for x
    x = 95,905,626,629.54/418,990.68
  6. Step 6: Final answer
    x = 228,896.80

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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.