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Finding the Fourth Proportional to 221,440.60, 309,317 and 221,440.60

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Solution

The fourth proportional to 221,440.60, 309,317 and 221,440.60 is: 309,317

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,440.60 : 309,317 = 221,440.60 : x
  2. Step 2: Convert to fraction form
    221,440.60/309,317 = 221,440.60/x
  3. Step 3: Cross multiply
    221,440.60x = 309,317 × 221,440.60
  4. Step 4: Simplify right side
    221,440.60x = 68,495,342,070.20
  5. Step 5: Solve for x
    x = 68,495,342,070.20/221,440.60
  6. Step 6: Final answer
    x = 309,317

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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.