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Finding the Fourth Proportional to 1,145.73, 1,718.55 and 365.70

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Solution

The fourth proportional to 1,145.73, 1,718.55 and 365.70 is: 548.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.73 : 1,718.55 = 365.70 : x
  2. Step 2: Convert to fraction form
    1,145.73/1,718.55 = 365.70/x
  3. Step 3: Cross multiply
    1,145.73x = 1,718.55 × 365.70
  4. Step 4: Simplify right side
    1,145.73x = 628,473.74
  5. Step 5: Solve for x
    x = 628,473.74/1,145.73
  6. Step 6: Final answer
    x = 548.54

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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.