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Finding the Fourth Proportional to 4,679.76, 7,019.62 and 1,217

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Solution

The fourth proportional to 4,679.76, 7,019.62 and 1,217 is: 1,825.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,679.76 : 7,019.62 = 1,217 : x
  2. Step 2: Convert to fraction form
    4,679.76/7,019.62 = 1,217/x
  3. Step 3: Cross multiply
    4,679.76x = 7,019.62 × 1,217
  4. Step 4: Simplify right side
    4,679.76x = 8,542,877.54
  5. Step 5: Solve for x
    x = 8,542,877.54/4,679.76
  6. Step 6: Final answer
    x = 1,825.49

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Double scale
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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.