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Finding the Fourth Proportional to 1,033.40, 1,426.74 and 718.57

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Solution

The fourth proportional to 1,033.40, 1,426.74 and 718.57 is: 992.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,033.40 : 1,426.74 = 718.57 : x
  2. Step 2: Convert to fraction form
    1,033.40/1,426.74 = 718.57/x
  3. Step 3: Cross multiply
    1,033.40x = 1,426.74 × 718.57
  4. Step 4: Simplify right side
    1,033.40x = 1,025,212.56
  5. Step 5: Solve for x
    x = 1,025,212.56/1,033.40
  6. Step 6: Final answer
    x = 992.08

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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.