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Finding the Fourth Proportional to 1,115.39, 1,673.12 and 375.05

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Solution

The fourth proportional to 1,115.39, 1,673.12 and 375.05 is: 562.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.39 : 1,673.12 = 375.05 : x
  2. Step 2: Convert to fraction form
    1,115.39/1,673.12 = 375.05/x
  3. Step 3: Cross multiply
    1,115.39x = 1,673.12 × 375.05
  4. Step 4: Simplify right side
    1,115.39x = 627,499.37
  5. Step 5: Solve for x
    x = 627,499.37/1,115.39
  6. Step 6: Final answer
    x = 562.58

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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.