Home / 1,180.20-1,628.67-649.10

Finding the Fourth Proportional to 1,180.20, 1,628.67 and 649.10

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Solution

The fourth proportional to 1,180.20, 1,628.67 and 649.10 is: 895.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.20 : 1,628.67 = 649.10 : x
  2. Step 2: Convert to fraction form
    1,180.20/1,628.67 = 649.10/x
  3. Step 3: Cross multiply
    1,180.20x = 1,628.67 × 649.10
  4. Step 4: Simplify right side
    1,180.20x = 1,057,161.55
  5. Step 5: Solve for x
    x = 1,057,161.55/1,180.20
  6. Step 6: Final answer
    x = 895.75

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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.