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Finding the Fourth Proportional to 479.93, 719.90 and 394.25

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Solution

The fourth proportional to 479.93, 719.90 and 394.25 is: 591.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.93 : 719.90 = 394.25 : x
  2. Step 2: Convert to fraction form
    479.93/719.90 = 394.25/x
  3. Step 3: Cross multiply
    479.93x = 719.90 × 394.25
  4. Step 4: Simplify right side
    479.93x = 283,818.60
  5. Step 5: Solve for x
    x = 283,818.60/479.93
  6. Step 6: Final answer
    x = 591.38

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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.