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Finding the Fourth Proportional to 4,891.72, 7,337.58 and 1,428.96

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Solution

The fourth proportional to 4,891.72, 7,337.58 and 1,428.96 is: 2,143.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,891.72 : 7,337.58 = 1,428.96 : x
  2. Step 2: Convert to fraction form
    4,891.72/7,337.58 = 1,428.96/x
  3. Step 3: Cross multiply
    4,891.72x = 7,337.58 × 1,428.96
  4. Step 4: Simplify right side
    4,891.72x = 10,485,108.32
  5. Step 5: Solve for x
    x = 10,485,108.32/4,891.72
  6. Step 6: Final answer
    x = 2,143.44

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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.