Home / 1,688.76-2,531.43-1,139.58

Finding the Fourth Proportional to 1,688.76, 2,531.43 and 1,139.58

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Solution

The fourth proportional to 1,688.76, 2,531.43 and 1,139.58 is: 1,708.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.76 : 2,531.43 = 1,139.58 : x
  2. Step 2: Convert to fraction form
    1,688.76/2,531.43 = 1,139.58/x
  3. Step 3: Cross multiply
    1,688.76x = 2,531.43 × 1,139.58
  4. Step 4: Simplify right side
    1,688.76x = 2,884,767.00
  5. Step 5: Solve for x
    x = 2,884,767.00/1,688.76
  6. Step 6: Final answer
    x = 1,708.22

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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.