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Finding the Fourth Proportional to 486,146.40, 729,219.60 and 219,915.60

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Solution

The fourth proportional to 486,146.40, 729,219.60 and 219,915.60 is: 329,873.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,146.40 : 729,219.60 = 219,915.60 : x
  2. Step 2: Convert to fraction form
    486,146.40/729,219.60 = 219,915.60/x
  3. Step 3: Cross multiply
    486,146.40x = 729,219.60 × 219,915.60
  4. Step 4: Simplify right side
    486,146.40x = 160,366,765,865.76
  5. Step 5: Solve for x
    x = 160,366,765,865.76/486,146.40
  6. Step 6: Final answer
    x = 329,873.40

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Similar ratio
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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.