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Finding the Fourth Proportional to 4,759.46, 7,139.20 and 1,984.40

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Solution

The fourth proportional to 4,759.46, 7,139.20 and 1,984.40 is: 2,976.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,759.46 : 7,139.20 = 1,984.40 : x
  2. Step 2: Convert to fraction form
    4,759.46/7,139.20 = 1,984.40/x
  3. Step 3: Cross multiply
    4,759.46x = 7,139.20 × 1,984.40
  4. Step 4: Simplify right side
    4,759.46x = 14,167,028.48
  5. Step 5: Solve for x
    x = 14,167,028.48/4,759.46
  6. Step 6: Final answer
    x = 2,976.60

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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.