Home / 1,397.45-1,923.64-1,208.31

Finding the Fourth Proportional to 1,397.45, 1,923.64 and 1,208.31

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Solution

The fourth proportional to 1,397.45, 1,923.64 and 1,208.31 is: 1,663.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.45 : 1,923.64 = 1,208.31 : x
  2. Step 2: Convert to fraction form
    1,397.45/1,923.64 = 1,208.31/x
  3. Step 3: Cross multiply
    1,397.45x = 1,923.64 × 1,208.31
  4. Step 4: Simplify right side
    1,397.45x = 2,324,353.45
  5. Step 5: Solve for x
    x = 2,324,353.45/1,397.45
  6. Step 6: Final answer
    x = 1,663.28

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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.