Home / 1,131.29-1,698.64-923.98

Finding the Fourth Proportional to 1,131.29, 1,698.64 and 923.98

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Solution

The fourth proportional to 1,131.29, 1,698.64 and 923.98 is: 1,387.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.29 : 1,698.64 = 923.98 : x
  2. Step 2: Convert to fraction form
    1,131.29/1,698.64 = 923.98/x
  3. Step 3: Cross multiply
    1,131.29x = 1,698.64 × 923.98
  4. Step 4: Simplify right side
    1,131.29x = 1,569,509.39
  5. Step 5: Solve for x
    x = 1,569,509.39/1,131.29
  6. Step 6: Final answer
    x = 1,387.36

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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.