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Finding the Fourth Proportional to 867.24, 1,300.82 and 319.39

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Solution

The fourth proportional to 867.24, 1,300.82 and 319.39 is: 479.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.24 : 1,300.82 = 319.39 : x
  2. Step 2: Convert to fraction form
    867.24/1,300.82 = 319.39/x
  3. Step 3: Cross multiply
    867.24x = 1,300.82 × 319.39
  4. Step 4: Simplify right side
    867.24x = 415,462.40
  5. Step 5: Solve for x
    x = 415,462.40/867.24
  6. Step 6: Final answer
    x = 479.06

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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.