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Finding the Fourth Proportional to 1,313.79, 1,813.04 and 724.33

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Solution

The fourth proportional to 1,313.79, 1,813.04 and 724.33 is: 999.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313.79 : 1,813.04 = 724.33 : x
  2. Step 2: Convert to fraction form
    1,313.79/1,813.04 = 724.33/x
  3. Step 3: Cross multiply
    1,313.79x = 1,813.04 × 724.33
  4. Step 4: Simplify right side
    1,313.79x = 1,313,239.26
  5. Step 5: Solve for x
    x = 1,313,239.26/1,313.79
  6. Step 6: Final answer
    x = 999.58

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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.