Home / 1,120.11-1,680.84-503.57

Finding the Fourth Proportional to 1,120.11, 1,680.84 and 503.57

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Solution

The fourth proportional to 1,120.11, 1,680.84 and 503.57 is: 755.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.11 : 1,680.84 = 503.57 : x
  2. Step 2: Convert to fraction form
    1,120.11/1,680.84 = 503.57/x
  3. Step 3: Cross multiply
    1,120.11x = 1,680.84 × 503.57
  4. Step 4: Simplify right side
    1,120.11x = 846,412.19
  5. Step 5: Solve for x
    x = 846,412.19/1,120.11
  6. Step 6: Final answer
    x = 755.65

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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.