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Finding the Fourth Proportional to 717.07, 1,074.60 and 305.65

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Solution

The fourth proportional to 717.07, 1,074.60 and 305.65 is: 458.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.07 : 1,074.60 = 305.65 : x
  2. Step 2: Convert to fraction form
    717.07/1,074.60 = 305.65/x
  3. Step 3: Cross multiply
    717.07x = 1,074.60 × 305.65
  4. Step 4: Simplify right side
    717.07x = 328,451.49
  5. Step 5: Solve for x
    x = 328,451.49/717.07
  6. Step 6: Final answer
    x = 458.05

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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.