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Finding the Fourth Proportional to 321.03, 482.67 and 259.47

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Solution

The fourth proportional to 321.03, 482.67 and 259.47 is: 390.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.03 : 482.67 = 259.47 : x
  2. Step 2: Convert to fraction form
    321.03/482.67 = 259.47/x
  3. Step 3: Cross multiply
    321.03x = 482.67 × 259.47
  4. Step 4: Simplify right side
    321.03x = 125,238.38
  5. Step 5: Solve for x
    x = 125,238.38/321.03
  6. Step 6: Final answer
    x = 390.11

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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.