Home / 1,109.16-1,530.53-611.67

Finding the Fourth Proportional to 1,109.16, 1,530.53 and 611.67

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Solution

The fourth proportional to 1,109.16, 1,530.53 and 611.67 is: 844.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109.16 : 1,530.53 = 611.67 : x
  2. Step 2: Convert to fraction form
    1,109.16/1,530.53 = 611.67/x
  3. Step 3: Cross multiply
    1,109.16x = 1,530.53 × 611.67
  4. Step 4: Simplify right side
    1,109.16x = 936,187.70
  5. Step 5: Solve for x
    x = 936,187.70/1,109.16
  6. Step 6: Final answer
    x = 844.05

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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.