Home / 1,685.78-2,528.67-1,108.52

Finding the Fourth Proportional to 1,685.78, 2,528.67 and 1,108.52

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Solution

The fourth proportional to 1,685.78, 2,528.67 and 1,108.52 is: 1,662.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.78 : 2,528.67 = 1,108.52 : x
  2. Step 2: Convert to fraction form
    1,685.78/2,528.67 = 1,108.52/x
  3. Step 3: Cross multiply
    1,685.78x = 2,528.67 × 1,108.52
  4. Step 4: Simplify right side
    1,685.78x = 2,803,081.27
  5. Step 5: Solve for x
    x = 2,803,081.27/1,685.78
  6. Step 6: Final answer
    x = 1,662.78

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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.