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Finding the Fourth Proportional to 371.05, 511.32 and 356.07

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Solution

The fourth proportional to 371.05, 511.32 and 356.07 is: 490.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.05 : 511.32 = 356.07 : x
  2. Step 2: Convert to fraction form
    371.05/511.32 = 356.07/x
  3. Step 3: Cross multiply
    371.05x = 511.32 × 356.07
  4. Step 4: Simplify right side
    371.05x = 182,065.71
  5. Step 5: Solve for x
    x = 182,065.71/371.05
  6. Step 6: Final answer
    x = 490.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.