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Finding the Fourth Proportional to 2,379.63, 3,571.35 and 1,686.99

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Solution

The fourth proportional to 2,379.63, 3,571.35 and 1,686.99 is: 2,531.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,379.63 : 3,571.35 = 1,686.99 : x
  2. Step 2: Convert to fraction form
    2,379.63/3,571.35 = 1,686.99/x
  3. Step 3: Cross multiply
    2,379.63x = 3,571.35 × 1,686.99
  4. Step 4: Simplify right side
    2,379.63x = 6,024,831.74
  5. Step 5: Solve for x
    x = 6,024,831.74/2,379.63
  6. Step 6: Final answer
    x = 2,531.84

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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.