Home / 1,156.07-1,724.36-1,121.49

Finding the Fourth Proportional to 1,156.07, 1,724.36 and 1,121.49

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Solution

The fourth proportional to 1,156.07, 1,724.36 and 1,121.49 is: 1,672.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,156.07 : 1,724.36 = 1,121.49 : x
  2. Step 2: Convert to fraction form
    1,156.07/1,724.36 = 1,121.49/x
  3. Step 3: Cross multiply
    1,156.07x = 1,724.36 × 1,121.49
  4. Step 4: Simplify right side
    1,156.07x = 1,933,852.50
  5. Step 5: Solve for x
    x = 1,933,852.50/1,156.07
  6. Step 6: Final answer
    x = 1,672.78

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Double scale
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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.