Home / 1,292.11-1,928.25-1,153.71

Finding the Fourth Proportional to 1,292.11, 1,928.25 and 1,153.71

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Solution

The fourth proportional to 1,292.11, 1,928.25 and 1,153.71 is: 1,721.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.11 : 1,928.25 = 1,153.71 : x
  2. Step 2: Convert to fraction form
    1,292.11/1,928.25 = 1,153.71/x
  3. Step 3: Cross multiply
    1,292.11x = 1,928.25 × 1,153.71
  4. Step 4: Simplify right side
    1,292.11x = 2,224,641.31
  5. Step 5: Solve for x
    x = 2,224,641.31/1,292.11
  6. Step 6: Final answer
    x = 1,721.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.