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Finding the Fourth Proportional to 5,287.75, 7,293.72 and 3,398.70

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Solution

The fourth proportional to 5,287.75, 7,293.72 and 3,398.70 is: 4,688.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,287.75 : 7,293.72 = 3,398.70 : x
  2. Step 2: Convert to fraction form
    5,287.75/7,293.72 = 3,398.70/x
  3. Step 3: Cross multiply
    5,287.75x = 7,293.72 × 3,398.70
  4. Step 4: Simplify right side
    5,287.75x = 24,789,129.70
  5. Step 5: Solve for x
    x = 24,789,129.70/5,287.75
  6. Step 6: Final answer
    x = 4,688.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.