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Finding the Fourth Proportional to 4,493.54, 6,740.08 and 1,720

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Solution

The fourth proportional to 4,493.54, 6,740.08 and 1,720 is: 2,579.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,493.54 : 6,740.08 = 1,720 : x
  2. Step 2: Convert to fraction form
    4,493.54/6,740.08 = 1,720/x
  3. Step 3: Cross multiply
    4,493.54x = 6,740.08 × 1,720
  4. Step 4: Simplify right side
    4,493.54x = 11,592,937.60
  5. Step 5: Solve for x
    x = 11,592,937.60/4,493.54
  6. Step 6: Final answer
    x = 2,579.91

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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.