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Finding the Fourth Proportional to 1,643.33, 2,465.67 and 718.41

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Solution

The fourth proportional to 1,643.33, 2,465.67 and 718.41 is: 1,077.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.33 : 2,465.67 = 718.41 : x
  2. Step 2: Convert to fraction form
    1,643.33/2,465.67 = 718.41/x
  3. Step 3: Cross multiply
    1,643.33x = 2,465.67 × 718.41
  4. Step 4: Simplify right side
    1,643.33x = 1,771,361.98
  5. Step 5: Solve for x
    x = 1,771,361.98/1,643.33
  6. Step 6: Final answer
    x = 1,077.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.