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Finding the Fourth Proportional to 1,146.89, 1,721.24 and 416.67

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Solution

The fourth proportional to 1,146.89, 1,721.24 and 416.67 is: 625.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.89 : 1,721.24 = 416.67 : x
  2. Step 2: Convert to fraction form
    1,146.89/1,721.24 = 416.67/x
  3. Step 3: Cross multiply
    1,146.89x = 1,721.24 × 416.67
  4. Step 4: Simplify right side
    1,146.89x = 717,189.07
  5. Step 5: Solve for x
    x = 717,189.07/1,146.89
  6. Step 6: Final answer
    x = 625.33

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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.