Home / 1,131.36-1,697.20-515.08

Finding the Fourth Proportional to 1,131.36, 1,697.20 and 515.08

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Solution

The fourth proportional to 1,131.36, 1,697.20 and 515.08 is: 772.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.36 : 1,697.20 = 515.08 : x
  2. Step 2: Convert to fraction form
    1,131.36/1,697.20 = 515.08/x
  3. Step 3: Cross multiply
    1,131.36x = 1,697.20 × 515.08
  4. Step 4: Simplify right side
    1,131.36x = 874,193.78
  5. Step 5: Solve for x
    x = 874,193.78/1,131.36
  6. Step 6: Final answer
    x = 772.69

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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.