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Finding the Fourth Proportional to 744.75, 1,117.12 and 305.91

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Solution

The fourth proportional to 744.75, 1,117.12 and 305.91 is: 458.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.75 : 1,117.12 = 305.91 : x
  2. Step 2: Convert to fraction form
    744.75/1,117.12 = 305.91/x
  3. Step 3: Cross multiply
    744.75x = 1,117.12 × 305.91
  4. Step 4: Simplify right side
    744.75x = 341,738.18
  5. Step 5: Solve for x
    x = 341,738.18/744.75
  6. Step 6: Final answer
    x = 458.86

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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.