Home / 1,316.12-1,816.22-726.69

Finding the Fourth Proportional to 1,316.12, 1,816.22 and 726.69

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Solution

The fourth proportional to 1,316.12, 1,816.22 and 726.69 is: 1,002.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.12 : 1,816.22 = 726.69 : x
  2. Step 2: Convert to fraction form
    1,316.12/1,816.22 = 726.69/x
  3. Step 3: Cross multiply
    1,316.12x = 1,816.22 × 726.69
  4. Step 4: Simplify right side
    1,316.12x = 1,319,825.28
  5. Step 5: Solve for x
    x = 1,319,825.28/1,316.12
  6. Step 6: Final answer
    x = 1,002.82

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1.5x scale

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.