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Finding the Fourth Proportional to 321.84, 483.30 and 319.32

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Solution

The fourth proportional to 321.84, 483.30 and 319.32 is: 479.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.84 : 483.30 = 319.32 : x
  2. Step 2: Convert to fraction form
    321.84/483.30 = 319.32/x
  3. Step 3: Cross multiply
    321.84x = 483.30 × 319.32
  4. Step 4: Simplify right side
    321.84x = 154,327.36
  5. Step 5: Solve for x
    x = 154,327.36/321.84
  6. Step 6: Final answer
    x = 479.52

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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.