Home / 1,014.28-1,399.82-621.07

Finding the Fourth Proportional to 1,014.28, 1,399.82 and 621.07

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Solution

The fourth proportional to 1,014.28, 1,399.82 and 621.07 is: 857.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.28 : 1,399.82 = 621.07 : x
  2. Step 2: Convert to fraction form
    1,014.28/1,399.82 = 621.07/x
  3. Step 3: Cross multiply
    1,014.28x = 1,399.82 × 621.07
  4. Step 4: Simplify right side
    1,014.28x = 869,379.60
  5. Step 5: Solve for x
    x = 869,379.60/1,014.28
  6. Step 6: Final answer
    x = 857.14

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1.5x scale

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.