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Finding the Fourth Proportional to 399.63, 601.81 and 348.87

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Solution

The fourth proportional to 399.63, 601.81 and 348.87 is: 525.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.63 : 601.81 = 348.87 : x
  2. Step 2: Convert to fraction form
    399.63/601.81 = 348.87/x
  3. Step 3: Cross multiply
    399.63x = 601.81 × 348.87
  4. Step 4: Simplify right side
    399.63x = 209,956.80
  5. Step 5: Solve for x
    x = 209,956.80/399.63
  6. Step 6: Final answer
    x = 525.37

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.