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Finding the Fourth Proportional to 3,640.74, 5,459.49 and 1,693.50

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Solution

The fourth proportional to 3,640.74, 5,459.49 and 1,693.50 is: 2,539.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,640.74 : 5,459.49 = 1,693.50 : x
  2. Step 2: Convert to fraction form
    3,640.74/5,459.49 = 1,693.50/x
  3. Step 3: Cross multiply
    3,640.74x = 5,459.49 × 1,693.50
  4. Step 4: Simplify right side
    3,640.74x = 9,245,646.32
  5. Step 5: Solve for x
    x = 9,245,646.32/3,640.74
  6. Step 6: Final answer
    x = 2,539.50

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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.