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Finding the Fourth Proportional to 619.75, 928.32 and 372.16

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Solution

The fourth proportional to 619.75, 928.32 and 372.16 is: 557.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.75 : 928.32 = 372.16 : x
  2. Step 2: Convert to fraction form
    619.75/928.32 = 372.16/x
  3. Step 3: Cross multiply
    619.75x = 928.32 × 372.16
  4. Step 4: Simplify right side
    619.75x = 345,483.57
  5. Step 5: Solve for x
    x = 345,483.57/619.75
  6. Step 6: Final answer
    x = 557.46

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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.