Home / 1,127.01-1,555.20-629.58

Finding the Fourth Proportional to 1,127.01, 1,555.20 and 629.58

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Solution

The fourth proportional to 1,127.01, 1,555.20 and 629.58 is: 868.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.01 : 1,555.20 = 629.58 : x
  2. Step 2: Convert to fraction form
    1,127.01/1,555.20 = 629.58/x
  3. Step 3: Cross multiply
    1,127.01x = 1,555.20 × 629.58
  4. Step 4: Simplify right side
    1,127.01x = 979,122.82
  5. Step 5: Solve for x
    x = 979,122.82/1,127.01
  6. Step 6: Final answer
    x = 868.78

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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.