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Finding the Fourth Proportional to 1,115.75, 1,673.63 and 346.25

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Solution

The fourth proportional to 1,115.75, 1,673.63 and 346.25 is: 519.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.75 : 1,673.63 = 346.25 : x
  2. Step 2: Convert to fraction form
    1,115.75/1,673.63 = 346.25/x
  3. Step 3: Cross multiply
    1,115.75x = 1,673.63 × 346.25
  4. Step 4: Simplify right side
    1,115.75x = 579,494.39
  5. Step 5: Solve for x
    x = 579,494.39/1,115.75
  6. Step 6: Final answer
    x = 519.38

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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.