Home / 1,042.30-1,556.42-905.68

Finding the Fourth Proportional to 1,042.30, 1,556.42 and 905.68

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Solution

The fourth proportional to 1,042.30, 1,556.42 and 905.68 is: 1,352.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,042.30 : 1,556.42 = 905.68 : x
  2. Step 2: Convert to fraction form
    1,042.30/1,556.42 = 905.68/x
  3. Step 3: Cross multiply
    1,042.30x = 1,556.42 × 905.68
  4. Step 4: Simplify right side
    1,042.30x = 1,409,618.47
  5. Step 5: Solve for x
    x = 1,409,618.47/1,042.30
  6. Step 6: Final answer
    x = 1,352.41

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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.