Home / 1,236.40-1,838.70-1,197.47

Finding the Fourth Proportional to 1,236.40, 1,838.70 and 1,197.47

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Solution

The fourth proportional to 1,236.40, 1,838.70 and 1,197.47 is: 1,780.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.40 : 1,838.70 = 1,197.47 : x
  2. Step 2: Convert to fraction form
    1,236.40/1,838.70 = 1,197.47/x
  3. Step 3: Cross multiply
    1,236.40x = 1,838.70 × 1,197.47
  4. Step 4: Simplify right side
    1,236.40x = 2,201,792.69
  5. Step 5: Solve for x
    x = 2,201,792.69/1,236.40
  6. Step 6: Final answer
    x = 1,780.81

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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.