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Finding the Fourth Proportional to 221,990.40, 332,985.60 and 74,246.40

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Solution

The fourth proportional to 221,990.40, 332,985.60 and 74,246.40 is: 111,369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,990.40 : 332,985.60 = 74,246.40 : x
  2. Step 2: Convert to fraction form
    221,990.40/332,985.60 = 74,246.40/x
  3. Step 3: Cross multiply
    221,990.40x = 332,985.60 × 74,246.40
  4. Step 4: Simplify right side
    221,990.40x = 24,722,982,051.84
  5. Step 5: Solve for x
    x = 24,722,982,051.84/221,990.40
  6. Step 6: Final answer
    x = 111,369.60

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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.