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Finding the Fourth Proportional to 376.83, 561.72 and 356.31

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Solution

The fourth proportional to 376.83, 561.72 and 356.31 is: 531.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.83 : 561.72 = 356.31 : x
  2. Step 2: Convert to fraction form
    376.83/561.72 = 356.31/x
  3. Step 3: Cross multiply
    376.83x = 561.72 × 356.31
  4. Step 4: Simplify right side
    376.83x = 200,146.45
  5. Step 5: Solve for x
    x = 200,146.45/376.83
  6. Step 6: Final answer
    x = 531.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.