Home / 1,133.11-1,698.09-515.31

Finding the Fourth Proportional to 1,133.11, 1,698.09 and 515.31

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Solution

The fourth proportional to 1,133.11, 1,698.09 and 515.31 is: 772.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,133.11 : 1,698.09 = 515.31 : x
  2. Step 2: Convert to fraction form
    1,133.11/1,698.09 = 515.31/x
  3. Step 3: Cross multiply
    1,133.11x = 1,698.09 × 515.31
  4. Step 4: Simplify right side
    1,133.11x = 875,042.76
  5. Step 5: Solve for x
    x = 875,042.76/1,133.11
  6. Step 6: Final answer
    x = 772.25

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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.