Home / 2,120.07-2,925.54-1,223.18

Finding the Fourth Proportional to 2,120.07, 2,925.54 and 1,223.18

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Solution

The fourth proportional to 2,120.07, 2,925.54 and 1,223.18 is: 1,687.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.07 : 2,925.54 = 1,223.18 : x
  2. Step 2: Convert to fraction form
    2,120.07/2,925.54 = 1,223.18/x
  3. Step 3: Cross multiply
    2,120.07x = 2,925.54 × 1,223.18
  4. Step 4: Simplify right side
    2,120.07x = 3,578,453.57
  5. Step 5: Solve for x
    x = 3,578,453.57/2,120.07
  6. Step 6: Final answer
    x = 1,687.89

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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.