Home / 1,081.40-1,621.38-503.96

Finding the Fourth Proportional to 1,081.40, 1,621.38 and 503.96

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Solution

The fourth proportional to 1,081.40, 1,621.38 and 503.96 is: 755.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.40 : 1,621.38 = 503.96 : x
  2. Step 2: Convert to fraction form
    1,081.40/1,621.38 = 503.96/x
  3. Step 3: Cross multiply
    1,081.40x = 1,621.38 × 503.96
  4. Step 4: Simplify right side
    1,081.40x = 817,110.66
  5. Step 5: Solve for x
    x = 817,110.66/1,081.40
  6. Step 6: Final answer
    x = 755.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.