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Finding the Fourth Proportional to 221,451.10, 309,331.70 and 221,451.10

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Solution

The fourth proportional to 221,451.10, 309,331.70 and 221,451.10 is: 309,331.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,451.10 : 309,331.70 = 221,451.10 : x
  2. Step 2: Convert to fraction form
    221,451.10/309,331.70 = 221,451.10/x
  3. Step 3: Cross multiply
    221,451.10x = 309,331.70 × 221,451.10
  4. Step 4: Simplify right side
    221,451.10x = 68,501,845,229.87
  5. Step 5: Solve for x
    x = 68,501,845,229.87/221,451.10
  6. Step 6: Final answer
    x = 309,331.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.