Home / 1,127.29-1,555.59-629.97

Finding the Fourth Proportional to 1,127.29, 1,555.59 and 629.97

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Solution

The fourth proportional to 1,127.29, 1,555.59 and 629.97 is: 869.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.29 : 1,555.59 = 629.97 : x
  2. Step 2: Convert to fraction form
    1,127.29/1,555.59 = 629.97/x
  3. Step 3: Cross multiply
    1,127.29x = 1,555.59 × 629.97
  4. Step 4: Simplify right side
    1,127.29x = 979,971.93
  5. Step 5: Solve for x
    x = 979,971.93/1,127.29
  6. Step 6: Final answer
    x = 869.32

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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.