Home / 2,151.64-2,969.28-1,220.08

Finding the Fourth Proportional to 2,151.64, 2,969.28 and 1,220.08

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Solution

The fourth proportional to 2,151.64, 2,969.28 and 1,220.08 is: 1,683.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.64 : 2,969.28 = 1,220.08 : x
  2. Step 2: Convert to fraction form
    2,151.64/2,969.28 = 1,220.08/x
  3. Step 3: Cross multiply
    2,151.64x = 2,969.28 × 1,220.08
  4. Step 4: Simplify right side
    2,151.64x = 3,622,759.14
  5. Step 5: Solve for x
    x = 3,622,759.14/2,151.64
  6. Step 6: Final answer
    x = 1,683.72

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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.