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Finding the Fourth Proportional to 2,409.69, 3,614.54 and 870.69

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Solution

The fourth proportional to 2,409.69, 3,614.54 and 870.69 is: 1,306.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,409.69 : 3,614.54 = 870.69 : x
  2. Step 2: Convert to fraction form
    2,409.69/3,614.54 = 870.69/x
  3. Step 3: Cross multiply
    2,409.69x = 3,614.54 × 870.69
  4. Step 4: Simplify right side
    2,409.69x = 3,147,143.83
  5. Step 5: Solve for x
    x = 3,147,143.83/2,409.69
  6. Step 6: Final answer
    x = 1,306.04

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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.