Home / 1,386.50-2,072.22-1,192.70

Finding the Fourth Proportional to 1,386.50, 2,072.22 and 1,192.70

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Solution

The fourth proportional to 1,386.50, 2,072.22 and 1,192.70 is: 1,782.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.50 : 2,072.22 = 1,192.70 : x
  2. Step 2: Convert to fraction form
    1,386.50/2,072.22 = 1,192.70/x
  3. Step 3: Cross multiply
    1,386.50x = 2,072.22 × 1,192.70
  4. Step 4: Simplify right side
    1,386.50x = 2,471,536.79
  5. Step 5: Solve for x
    x = 2,471,536.79/1,386.50
  6. Step 6: Final answer
    x = 1,782.57

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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.