Home / 1,222.60-1,685.28-926.68

Finding the Fourth Proportional to 1,222.60, 1,685.28 and 926.68

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Solution

The fourth proportional to 1,222.60, 1,685.28 and 926.68 is: 1,277.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222.60 : 1,685.28 = 926.68 : x
  2. Step 2: Convert to fraction form
    1,222.60/1,685.28 = 926.68/x
  3. Step 3: Cross multiply
    1,222.60x = 1,685.28 × 926.68
  4. Step 4: Simplify right side
    1,222.60x = 1,561,715.27
  5. Step 5: Solve for x
    x = 1,561,715.27/1,222.60
  6. Step 6: Final answer
    x = 1,277.37

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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.