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Finding the Fourth Proportional to 359.22, 494.58 and 313.20

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Solution

The fourth proportional to 359.22, 494.58 and 313.20 is: 431.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.22 : 494.58 = 313.20 : x
  2. Step 2: Convert to fraction form
    359.22/494.58 = 313.20/x
  3. Step 3: Cross multiply
    359.22x = 494.58 × 313.20
  4. Step 4: Simplify right side
    359.22x = 154,902.46
  5. Step 5: Solve for x
    x = 154,902.46/359.22
  6. Step 6: Final answer
    x = 431.22

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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.