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Finding the Fourth Proportional to 480.47, 719.99 and 394.40

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Solution

The fourth proportional to 480.47, 719.99 and 394.40 is: 591.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.47 : 719.99 = 394.40 : x
  2. Step 2: Convert to fraction form
    480.47/719.99 = 394.40/x
  3. Step 3: Cross multiply
    480.47x = 719.99 × 394.40
  4. Step 4: Simplify right side
    480.47x = 283,965.36
  5. Step 5: Solve for x
    x = 283,965.36/480.47
  6. Step 6: Final answer
    x = 591.02

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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.