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Finding the Fourth Proportional to 367,987.80, 551,981.70 and 321,331.80

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Solution

The fourth proportional to 367,987.80, 551,981.70 and 321,331.80 is: 481,997.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    367,987.80 : 551,981.70 = 321,331.80 : x
  2. Step 2: Convert to fraction form
    367,987.80/551,981.70 = 321,331.80/x
  3. Step 3: Cross multiply
    367,987.80x = 551,981.70 × 321,331.80
  4. Step 4: Simplify right side
    367,987.80x = 177,369,273,228.06
  5. Step 5: Solve for x
    x = 177,369,273,228.06/367,987.80
  6. Step 6: Final answer
    x = 481,997.70

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Similar ratio
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1.5x scale

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.