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Finding the Fourth Proportional to 320.37, 439.23 and 314.53

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Solution

The fourth proportional to 320.37, 439.23 and 314.53 is: 431.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.37 : 439.23 = 314.53 : x
  2. Step 2: Convert to fraction form
    320.37/439.23 = 314.53/x
  3. Step 3: Cross multiply
    320.37x = 439.23 × 314.53
  4. Step 4: Simplify right side
    320.37x = 138,152.29
  5. Step 5: Solve for x
    x = 138,152.29/320.37
  6. Step 6: Final answer
    x = 431.22

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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.