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Finding the Fourth Proportional to 1,146.78, 1,720.26 and 377.28

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Solution

The fourth proportional to 1,146.78, 1,720.26 and 377.28 is: 565.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.78 : 1,720.26 = 377.28 : x
  2. Step 2: Convert to fraction form
    1,146.78/1,720.26 = 377.28/x
  3. Step 3: Cross multiply
    1,146.78x = 1,720.26 × 377.28
  4. Step 4: Simplify right side
    1,146.78x = 649,019.69
  5. Step 5: Solve for x
    x = 649,019.69/1,146.78
  6. Step 6: Final answer
    x = 565.95

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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.