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Finding the Fourth Proportional to 375.10, 561.32 and 328.70

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Solution

The fourth proportional to 375.10, 561.32 and 328.70 is: 491.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.10 : 561.32 = 328.70 : x
  2. Step 2: Convert to fraction form
    375.10/561.32 = 328.70/x
  3. Step 3: Cross multiply
    375.10x = 561.32 × 328.70
  4. Step 4: Simplify right side
    375.10x = 184,505.64
  5. Step 5: Solve for x
    x = 184,505.64/375.10
  6. Step 6: Final answer
    x = 491.89

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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.