Home / 1,755.16-2,631.54-780.76

Finding the Fourth Proportional to 1,755.16, 2,631.54 and 780.76

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Solution

The fourth proportional to 1,755.16, 2,631.54 and 780.76 is: 1,170.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,755.16 : 2,631.54 = 780.76 : x
  2. Step 2: Convert to fraction form
    1,755.16/2,631.54 = 780.76/x
  3. Step 3: Cross multiply
    1,755.16x = 2,631.54 × 780.76
  4. Step 4: Simplify right side
    1,755.16x = 2,054,601.17
  5. Step 5: Solve for x
    x = 2,054,601.17/1,755.16
  6. Step 6: Final answer
    x = 1,170.61

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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.