Home / 1,309.62-1,808.85-1,137.12

Finding the Fourth Proportional to 1,309.62, 1,808.85 and 1,137.12

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Solution

The fourth proportional to 1,309.62, 1,808.85 and 1,137.12 is: 1,570.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309.62 : 1,808.85 = 1,137.12 : x
  2. Step 2: Convert to fraction form
    1,309.62/1,808.85 = 1,137.12/x
  3. Step 3: Cross multiply
    1,309.62x = 1,808.85 × 1,137.12
  4. Step 4: Simplify right side
    1,309.62x = 2,056,879.51
  5. Step 5: Solve for x
    x = 2,056,879.51/1,309.62
  6. Step 6: Final answer
    x = 1,570.59

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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.