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Finding the Fourth Proportional to 359.48, 494.93 and 312.71

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Solution

The fourth proportional to 359.48, 494.93 and 312.71 is: 430.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.48 : 494.93 = 312.71 : x
  2. Step 2: Convert to fraction form
    359.48/494.93 = 312.71/x
  3. Step 3: Cross multiply
    359.48x = 494.93 × 312.71
  4. Step 4: Simplify right side
    359.48x = 154,767.87
  5. Step 5: Solve for x
    x = 154,767.87/359.48
  6. Step 6: Final answer
    x = 430.53

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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.