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Finding the Fourth Proportional to 376.38, 561.07 and 355.86

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Solution

The fourth proportional to 376.38, 561.07 and 355.86 is: 530.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.38 : 561.07 = 355.86 : x
  2. Step 2: Convert to fraction form
    376.38/561.07 = 355.86/x
  3. Step 3: Cross multiply
    376.38x = 561.07 × 355.86
  4. Step 4: Simplify right side
    376.38x = 199,662.37
  5. Step 5: Solve for x
    x = 199,662.37/376.38
  6. Step 6: Final answer
    x = 530.48

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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.