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Finding the Fourth Proportional to 439.95, 604.41 and 393.93

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Solution

The fourth proportional to 439.95, 604.41 and 393.93 is: 541.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.95 : 604.41 = 393.93 : x
  2. Step 2: Convert to fraction form
    439.95/604.41 = 393.93/x
  3. Step 3: Cross multiply
    439.95x = 604.41 × 393.93
  4. Step 4: Simplify right side
    439.95x = 238,095.23
  5. Step 5: Solve for x
    x = 238,095.23/439.95
  6. Step 6: Final answer
    x = 541.19

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.