Home / 1,014.36-1,399.72-621.32

Finding the Fourth Proportional to 1,014.36, 1,399.72 and 621.32

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Solution

The fourth proportional to 1,014.36, 1,399.72 and 621.32 is: 857.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.36 : 1,399.72 = 621.32 : x
  2. Step 2: Convert to fraction form
    1,014.36/1,399.72 = 621.32/x
  3. Step 3: Cross multiply
    1,014.36x = 1,399.72 × 621.32
  4. Step 4: Simplify right side
    1,014.36x = 869,674.03
  5. Step 5: Solve for x
    x = 869,674.03/1,014.36
  6. Step 6: Final answer
    x = 857.36

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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.