Home / 1,316.24-1,816.52-726.90

Finding the Fourth Proportional to 1,316.24, 1,816.52 and 726.90

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Solution

The fourth proportional to 1,316.24, 1,816.52 and 726.90 is: 1,003.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.24 : 1,816.52 = 726.90 : x
  2. Step 2: Convert to fraction form
    1,316.24/1,816.52 = 726.90/x
  3. Step 3: Cross multiply
    1,316.24x = 1,816.52 × 726.90
  4. Step 4: Simplify right side
    1,316.24x = 1,320,424.75
  5. Step 5: Solve for x
    x = 1,320,424.75/1,316.24
  6. Step 6: Final answer
    x = 1,003.18

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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.