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Finding the Fourth Proportional to 221,445.60, 309,324 and 221,445.60

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Solution

The fourth proportional to 221,445.60, 309,324 and 221,445.60 is: 309,324

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,445.60 : 309,324 = 221,445.60 : x
  2. Step 2: Convert to fraction form
    221,445.60/309,324 = 221,445.60/x
  3. Step 3: Cross multiply
    221,445.60x = 309,324 × 221,445.60
  4. Step 4: Simplify right side
    221,445.60x = 68,498,438,774.40
  5. Step 5: Solve for x
    x = 68,498,438,774.40/221,445.60
  6. Step 6: Final answer
    x = 309,324

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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.