Home / 1,919.10-2,647.56-1,210.66

Finding the Fourth Proportional to 1,919.10, 2,647.56 and 1,210.66

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Solution

The fourth proportional to 1,919.10, 2,647.56 and 1,210.66 is: 1,670.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.10 : 2,647.56 = 1,210.66 : x
  2. Step 2: Convert to fraction form
    1,919.10/2,647.56 = 1,210.66/x
  3. Step 3: Cross multiply
    1,919.10x = 2,647.56 × 1,210.66
  4. Step 4: Simplify right side
    1,919.10x = 3,205,294.99
  5. Step 5: Solve for x
    x = 3,205,294.99/1,919.10
  6. Step 6: Final answer
    x = 1,670.21

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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.