Home / 1,689.14-2,331.72-1,235.61

Finding the Fourth Proportional to 1,689.14, 2,331.72 and 1,235.61

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Solution

The fourth proportional to 1,689.14, 2,331.72 and 1,235.61 is: 1,705.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.14 : 2,331.72 = 1,235.61 : x
  2. Step 2: Convert to fraction form
    1,689.14/2,331.72 = 1,235.61/x
  3. Step 3: Cross multiply
    1,689.14x = 2,331.72 × 1,235.61
  4. Step 4: Simplify right side
    1,689.14x = 2,881,096.55
  5. Step 5: Solve for x
    x = 2,881,096.55/1,689.14
  6. Step 6: Final answer
    x = 1,705.66

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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.