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Finding the Fourth Proportional to 1,490.95, 2,236.38 and 395.38

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Solution

The fourth proportional to 1,490.95, 2,236.38 and 395.38 is: 593.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490.95 : 2,236.38 = 395.38 : x
  2. Step 2: Convert to fraction form
    1,490.95/2,236.38 = 395.38/x
  3. Step 3: Cross multiply
    1,490.95x = 2,236.38 × 395.38
  4. Step 4: Simplify right side
    1,490.95x = 884,219.92
  5. Step 5: Solve for x
    x = 884,219.92/1,490.95
  6. Step 6: Final answer
    x = 593.06

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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.