Home / 1,127.27-1,555.56-629.81

Finding the Fourth Proportional to 1,127.27, 1,555.56 and 629.81

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Solution

The fourth proportional to 1,127.27, 1,555.56 and 629.81 is: 869.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.27 : 1,555.56 = 629.81 : x
  2. Step 2: Convert to fraction form
    1,127.27/1,555.56 = 629.81/x
  3. Step 3: Cross multiply
    1,127.27x = 1,555.56 × 629.81
  4. Step 4: Simplify right side
    1,127.27x = 979,711.13
  5. Step 5: Solve for x
    x = 979,711.13/1,127.27
  6. Step 6: Final answer
    x = 869.10

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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.