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Finding the Fourth Proportional to 221,258.40, 331,484.40 and 127,485.60

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Solution

The fourth proportional to 221,258.40, 331,484.40 and 127,485.60 is: 190,996.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,258.40 : 331,484.40 = 127,485.60 : x
  2. Step 2: Convert to fraction form
    221,258.40/331,484.40 = 127,485.60/x
  3. Step 3: Cross multiply
    221,258.40x = 331,484.40 × 127,485.60
  4. Step 4: Simplify right side
    221,258.40x = 42,259,487,624.64
  5. Step 5: Solve for x
    x = 42,259,487,624.64/221,258.40
  6. Step 6: Final answer
    x = 190,996.08

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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.