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Finding the Fourth Proportional to 221,560.92, 306,009 and 161,400.60

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Solution

The fourth proportional to 221,560.92, 306,009 and 161,400.60 is: 222,918.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,560.92 : 306,009 = 161,400.60 : x
  2. Step 2: Convert to fraction form
    221,560.92/306,009 = 161,400.60/x
  3. Step 3: Cross multiply
    221,560.92x = 306,009 × 161,400.60
  4. Step 4: Simplify right side
    221,560.92x = 49,390,036,205.40
  5. Step 5: Solve for x
    x = 49,390,036,205.40/221,560.92
  6. Step 6: Final answer
    x = 222,918.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.