Home / 1,127.08-1,555.36-629.72

Finding the Fourth Proportional to 1,127.08, 1,555.36 and 629.72

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Solution

The fourth proportional to 1,127.08, 1,555.36 and 629.72 is: 869.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.08 : 1,555.36 = 629.72 : x
  2. Step 2: Convert to fraction form
    1,127.08/1,555.36 = 629.72/x
  3. Step 3: Cross multiply
    1,127.08x = 1,555.36 × 629.72
  4. Step 4: Simplify right side
    1,127.08x = 979,441.30
  5. Step 5: Solve for x
    x = 979,441.30/1,127.08
  6. Step 6: Final answer
    x = 869.01

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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.