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Finding the Fourth Proportional to 2,909.75, 4,364.57 and 718.47

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Solution

The fourth proportional to 2,909.75, 4,364.57 and 718.47 is: 1,077.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,909.75 : 4,364.57 = 718.47 : x
  2. Step 2: Convert to fraction form
    2,909.75/4,364.57 = 718.47/x
  3. Step 3: Cross multiply
    2,909.75x = 4,364.57 × 718.47
  4. Step 4: Simplify right side
    2,909.75x = 3,135,814.40
  5. Step 5: Solve for x
    x = 3,135,814.40/2,909.75
  6. Step 6: Final answer
    x = 1,077.69

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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.