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Finding the Fourth Proportional to 220,417.20, 330,188.40 and 120,430.80

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Solution

The fourth proportional to 220,417.20, 330,188.40 and 120,430.80 is: 180,407.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,417.20 : 330,188.40 = 120,430.80 : x
  2. Step 2: Convert to fraction form
    220,417.20/330,188.40 = 120,430.80/x
  3. Step 3: Cross multiply
    220,417.20x = 330,188.40 × 120,430.80
  4. Step 4: Simplify right side
    220,417.20x = 39,764,853,162.72
  5. Step 5: Solve for x
    x = 39,764,853,162.72/220,417.20
  6. Step 6: Final answer
    x = 180,407.21

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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.