Home / 1,966.36-2,715.53-1,220.62

Finding the Fourth Proportional to 1,966.36, 2,715.53 and 1,220.62

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Solution

The fourth proportional to 1,966.36, 2,715.53 and 1,220.62 is: 1,685.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,966.36 : 2,715.53 = 1,220.62 : x
  2. Step 2: Convert to fraction form
    1,966.36/2,715.53 = 1,220.62/x
  3. Step 3: Cross multiply
    1,966.36x = 2,715.53 × 1,220.62
  4. Step 4: Simplify right side
    1,966.36x = 3,314,622.43
  5. Step 5: Solve for x
    x = 3,314,622.43/1,966.36
  6. Step 6: Final answer
    x = 1,685.66

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1.5x scale

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.