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Finding the Fourth Proportional to 1,108.29, 1,661.70 and 377.58

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Solution

The fourth proportional to 1,108.29, 1,661.70 and 377.58 is: 566.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,108.29 : 1,661.70 = 377.58 : x
  2. Step 2: Convert to fraction form
    1,108.29/1,661.70 = 377.58/x
  3. Step 3: Cross multiply
    1,108.29x = 1,661.70 × 377.58
  4. Step 4: Simplify right side
    1,108.29x = 627,424.69
  5. Step 5: Solve for x
    x = 627,424.69/1,108.29
  6. Step 6: Final answer
    x = 566.12

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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.