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Finding the Fourth Proportional to 3,345.24, 5,019.48 and 1,398

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Solution

The fourth proportional to 3,345.24, 5,019.48 and 1,398 is: 2,097.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,345.24 : 5,019.48 = 1,398 : x
  2. Step 2: Convert to fraction form
    3,345.24/5,019.48 = 1,398/x
  3. Step 3: Cross multiply
    3,345.24x = 5,019.48 × 1,398
  4. Step 4: Simplify right side
    3,345.24x = 7,017,233.04
  5. Step 5: Solve for x
    x = 7,017,233.04/3,345.24
  6. Step 6: Final answer
    x = 2,097.68

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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.