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Finding the Fourth Proportional to 1,020.46, 1,530.96 and 395.57

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Solution

The fourth proportional to 1,020.46, 1,530.96 and 395.57 is: 593.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.46 : 1,530.96 = 395.57 : x
  2. Step 2: Convert to fraction form
    1,020.46/1,530.96 = 395.57/x
  3. Step 3: Cross multiply
    1,020.46x = 1,530.96 × 395.57
  4. Step 4: Simplify right side
    1,020.46x = 605,601.85
  5. Step 5: Solve for x
    x = 605,601.85/1,020.46
  6. Step 6: Final answer
    x = 593.46

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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.