Home / 3,545.78-5,318.76-1,205.78

Finding the Fourth Proportional to 3,545.78, 5,318.76 and 1,205.78

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Solution

The fourth proportional to 3,545.78, 5,318.76 and 1,205.78 is: 1,808.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,545.78 : 5,318.76 = 1,205.78 : x
  2. Step 2: Convert to fraction form
    3,545.78/5,318.76 = 1,205.78/x
  3. Step 3: Cross multiply
    3,545.78x = 5,318.76 × 1,205.78
  4. Step 4: Simplify right side
    3,545.78x = 6,413,254.43
  5. Step 5: Solve for x
    x = 6,413,254.43/3,545.78
  6. Step 6: Final answer
    x = 1,808.70

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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.