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Finding the Fourth Proportional to 3,618.92, 5,430.99 and 1,865.33

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Solution

The fourth proportional to 3,618.92, 5,430.99 and 1,865.33 is: 2,799.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.92 : 5,430.99 = 1,865.33 : x
  2. Step 2: Convert to fraction form
    3,618.92/5,430.99 = 1,865.33/x
  3. Step 3: Cross multiply
    3,618.92x = 5,430.99 × 1,865.33
  4. Step 4: Simplify right side
    3,618.92x = 10,130,561.42
  5. Step 5: Solve for x
    x = 10,130,561.42/3,618.92
  6. Step 6: Final answer
    x = 2,799.33

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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.