Home / 1,014.60-1,399.44-621.81

Finding the Fourth Proportional to 1,014.60, 1,399.44 and 621.81

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Solution

The fourth proportional to 1,014.60, 1,399.44 and 621.81 is: 857.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.60 : 1,399.44 = 621.81 : x
  2. Step 2: Convert to fraction form
    1,014.60/1,399.44 = 621.81/x
  3. Step 3: Cross multiply
    1,014.60x = 1,399.44 × 621.81
  4. Step 4: Simplify right side
    1,014.60x = 870,185.79
  5. Step 5: Solve for x
    x = 870,185.79/1,014.60
  6. Step 6: Final answer
    x = 857.66

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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.