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Finding the Fourth Proportional to 867.16, 1,300.93 and 319.33

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Solution

The fourth proportional to 867.16, 1,300.93 and 319.33 is: 479.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.16 : 1,300.93 = 319.33 : x
  2. Step 2: Convert to fraction form
    867.16/1,300.93 = 319.33/x
  3. Step 3: Cross multiply
    867.16x = 1,300.93 × 319.33
  4. Step 4: Simplify right side
    867.16x = 415,425.98
  5. Step 5: Solve for x
    x = 415,425.98/867.16
  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.