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Finding the Fourth Proportional to 357.99, 491.31 and 325.20

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Solution

The fourth proportional to 357.99, 491.31 and 325.20 is: 446.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.99 : 491.31 = 325.20 : x
  2. Step 2: Convert to fraction form
    357.99/491.31 = 325.20/x
  3. Step 3: Cross multiply
    357.99x = 491.31 × 325.20
  4. Step 4: Simplify right side
    357.99x = 159,774.01
  5. Step 5: Solve for x
    x = 159,774.01/357.99
  6. Step 6: Final answer
    x = 446.31

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.