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Finding the Fourth Proportional to 1,313.97, 1,813.24 and 724.49

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Solution

The fourth proportional to 1,313.97, 1,813.24 and 724.49 is: 999.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313.97 : 1,813.24 = 724.49 : x
  2. Step 2: Convert to fraction form
    1,313.97/1,813.24 = 724.49/x
  3. Step 3: Cross multiply
    1,313.97x = 1,813.24 × 724.49
  4. Step 4: Simplify right side
    1,313.97x = 1,313,674.25
  5. Step 5: Solve for x
    x = 1,313,674.25/1,313.97
  6. Step 6: Final answer
    x = 999.77

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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.