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Finding the Fourth Proportional to 486,290.20, 729,089.70 and 220,178.20

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Solution

The fourth proportional to 486,290.20, 729,089.70 and 220,178.20 is: 330,110.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,290.20 : 729,089.70 = 220,178.20 : x
  2. Step 2: Convert to fraction form
    486,290.20/729,089.70 = 220,178.20/x
  3. Step 3: Cross multiply
    486,290.20x = 729,089.70 × 220,178.20
  4. Step 4: Simplify right side
    486,290.20x = 160,529,657,784.54
  5. Step 5: Solve for x
    x = 160,529,657,784.54/486,290.20
  6. Step 6: Final answer
    x = 330,110.82

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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.