Home / 1,917.67-2,648.09-1,210.78

Finding the Fourth Proportional to 1,917.67, 2,648.09 and 1,210.78

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Solution

The fourth proportional to 1,917.67, 2,648.09 and 1,210.78 is: 1,671.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.67 : 2,648.09 = 1,210.78 : x
  2. Step 2: Convert to fraction form
    1,917.67/2,648.09 = 1,210.78/x
  3. Step 3: Cross multiply
    1,917.67x = 2,648.09 × 1,210.78
  4. Step 4: Simplify right side
    1,917.67x = 3,206,254.41
  5. Step 5: Solve for x
    x = 3,206,254.41/1,917.67
  6. Step 6: Final answer
    x = 1,671.95

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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.