Home / 2,155.36-2,974.08-1,223.84

Finding the Fourth Proportional to 2,155.36, 2,974.08 and 1,223.84

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Solution

The fourth proportional to 2,155.36, 2,974.08 and 1,223.84 is: 1,688.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.36 : 2,974.08 = 1,223.84 : x
  2. Step 2: Convert to fraction form
    2,155.36/2,974.08 = 1,223.84/x
  3. Step 3: Cross multiply
    2,155.36x = 2,974.08 × 1,223.84
  4. Step 4: Simplify right side
    2,155.36x = 3,639,798.07
  5. Step 5: Solve for x
    x = 3,639,798.07/2,155.36
  6. Step 6: Final answer
    x = 1,688.72

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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.