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Finding the Fourth Proportional to 1,686.50, 2,327.74 and 1,065.86

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Solution

The fourth proportional to 1,686.50, 2,327.74 and 1,065.86 is: 1,471.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.50 : 2,327.74 = 1,065.86 : x
  2. Step 2: Convert to fraction form
    1,686.50/2,327.74 = 1,065.86/x
  3. Step 3: Cross multiply
    1,686.50x = 2,327.74 × 1,065.86
  4. Step 4: Simplify right side
    1,686.50x = 2,481,044.96
  5. Step 5: Solve for x
    x = 2,481,044.96/1,686.50
  6. Step 6: Final answer
    x = 1,471.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.