Home / 1,515.30-2,272.41-649.14

Finding the Fourth Proportional to 1,515.30, 2,272.41 and 649.14

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Solution

The fourth proportional to 1,515.30, 2,272.41 and 649.14 is: 973.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.30 : 2,272.41 = 649.14 : x
  2. Step 2: Convert to fraction form
    1,515.30/2,272.41 = 649.14/x
  3. Step 3: Cross multiply
    1,515.30x = 2,272.41 × 649.14
  4. Step 4: Simplify right side
    1,515.30x = 1,475,112.23
  5. Step 5: Solve for x
    x = 1,475,112.23/1,515.30
  6. Step 6: Final answer
    x = 973.48

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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.