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Finding the Fourth Proportional to 619.95, 928.81 and 375.91

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Solution

The fourth proportional to 619.95, 928.81 and 375.91 is: 563.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.95 : 928.81 = 375.91 : x
  2. Step 2: Convert to fraction form
    619.95/928.81 = 375.91/x
  3. Step 3: Cross multiply
    619.95x = 928.81 × 375.91
  4. Step 4: Simplify right side
    619.95x = 349,148.97
  5. Step 5: Solve for x
    x = 349,148.97/619.95
  6. Step 6: Final answer
    x = 563.19

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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.