Home / 1,127.27-1,555.64-629.91

Finding the Fourth Proportional to 1,127.27, 1,555.64 and 629.91

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Solution

The fourth proportional to 1,127.27, 1,555.64 and 629.91 is: 869.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.27 : 1,555.64 = 629.91 : x
  2. Step 2: Convert to fraction form
    1,127.27/1,555.64 = 629.91/x
  3. Step 3: Cross multiply
    1,127.27x = 1,555.64 × 629.91
  4. Step 4: Simplify right side
    1,127.27x = 979,913.19
  5. Step 5: Solve for x
    x = 979,913.19/1,127.27
  6. Step 6: Final answer
    x = 869.28

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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.