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Finding the Fourth Proportional to 619.16, 928.32 and 208.18

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Solution

The fourth proportional to 619.16, 928.32 and 208.18 is: 312.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.16 : 928.32 = 208.18 : x
  2. Step 2: Convert to fraction form
    619.16/928.32 = 208.18/x
  3. Step 3: Cross multiply
    619.16x = 928.32 × 208.18
  4. Step 4: Simplify right side
    619.16x = 193,257.66
  5. Step 5: Solve for x
    x = 193,257.66/619.16
  6. Step 6: Final answer
    x = 312.13

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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.