Home / 1,531.31-2,296.98-491.31

Finding the Fourth Proportional to 1,531.31, 2,296.98 and 491.31

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Solution

The fourth proportional to 1,531.31, 2,296.98 and 491.31 is: 736.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.31 : 2,296.98 = 491.31 : x
  2. Step 2: Convert to fraction form
    1,531.31/2,296.98 = 491.31/x
  3. Step 3: Cross multiply
    1,531.31x = 2,296.98 × 491.31
  4. Step 4: Simplify right side
    1,531.31x = 1,128,529.24
  5. Step 5: Solve for x
    x = 1,128,529.24/1,531.31
  6. Step 6: Final answer
    x = 736.97

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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.