Home / 1,759.76-2,639.58-1,028.78

Finding the Fourth Proportional to 1,759.76, 2,639.58 and 1,028.78

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Solution

The fourth proportional to 1,759.76, 2,639.58 and 1,028.78 is: 1,543.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,759.76 : 2,639.58 = 1,028.78 : x
  2. Step 2: Convert to fraction form
    1,759.76/2,639.58 = 1,028.78/x
  3. Step 3: Cross multiply
    1,759.76x = 2,639.58 × 1,028.78
  4. Step 4: Simplify right side
    1,759.76x = 2,715,547.11
  5. Step 5: Solve for x
    x = 2,715,547.11/1,759.76
  6. Step 6: Final answer
    x = 1,543.13

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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.