Home / 1,210.26-1,814.18-661.31

Finding the Fourth Proportional to 1,210.26, 1,814.18 and 661.31

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Solution

The fourth proportional to 1,210.26, 1,814.18 and 661.31 is: 991.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.26 : 1,814.18 = 661.31 : x
  2. Step 2: Convert to fraction form
    1,210.26/1,814.18 = 661.31/x
  3. Step 3: Cross multiply
    1,210.26x = 1,814.18 × 661.31
  4. Step 4: Simplify right side
    1,210.26x = 1,199,735.38
  5. Step 5: Solve for x
    x = 1,199,735.38/1,210.26
  6. Step 6: Final answer
    x = 991.30

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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.