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Finding the Fourth Proportional to 3,345.20, 5,016.84 and 1,397

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Solution

The fourth proportional to 3,345.20, 5,016.84 and 1,397 is: 2,095.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,345.20 : 5,016.84 = 1,397 : x
  2. Step 2: Convert to fraction form
    3,345.20/5,016.84 = 1,397/x
  3. Step 3: Cross multiply
    3,345.20x = 5,016.84 × 1,397
  4. Step 4: Simplify right side
    3,345.20x = 7,008,525.48
  5. Step 5: Solve for x
    x = 7,008,525.48/3,345.20
  6. Step 6: Final answer
    x = 2,095.10

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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.