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Finding the Fourth Proportional to 486,016.20, 728,805.60 and 219,639.60

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Solution

The fourth proportional to 486,016.20, 728,805.60 and 219,639.60 is: 329,360.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,016.20 : 728,805.60 = 219,639.60 : x
  2. Step 2: Convert to fraction form
    486,016.20/728,805.60 = 219,639.60/x
  3. Step 3: Cross multiply
    486,016.20x = 728,805.60 × 219,639.60
  4. Step 4: Simplify right side
    486,016.20x = 160,074,570,461.76
  5. Step 5: Solve for x
    x = 160,074,570,461.76/486,016.20
  6. Step 6: Final answer
    x = 329,360.57

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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.