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Finding the Fourth Proportional to 1,187.17, 1,781.01 and 365.50

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Solution

The fourth proportional to 1,187.17, 1,781.01 and 365.50 is: 548.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187.17 : 1,781.01 = 365.50 : x
  2. Step 2: Convert to fraction form
    1,187.17/1,781.01 = 365.50/x
  3. Step 3: Cross multiply
    1,187.17x = 1,781.01 × 365.50
  4. Step 4: Simplify right side
    1,187.17x = 650,959.16
  5. Step 5: Solve for x
    x = 650,959.16/1,187.17
  6. Step 6: Final answer
    x = 548.33

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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.