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Finding the Fourth Proportional to 627.80, 940.16 and 319.19

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Solution

The fourth proportional to 627.80, 940.16 and 319.19 is: 478.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.80 : 940.16 = 319.19 : x
  2. Step 2: Convert to fraction form
    627.80/940.16 = 319.19/x
  3. Step 3: Cross multiply
    627.80x = 940.16 × 319.19
  4. Step 4: Simplify right side
    627.80x = 300,085.77
  5. Step 5: Solve for x
    x = 300,085.77/627.80
  6. Step 6: Final answer
    x = 478.00

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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.