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Finding the Fourth Proportional to 403.07, 601.07 and 399.42

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Solution

The fourth proportional to 403.07, 601.07 and 399.42 is: 595.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.07 : 601.07 = 399.42 : x
  2. Step 2: Convert to fraction form
    403.07/601.07 = 399.42/x
  3. Step 3: Cross multiply
    403.07x = 601.07 × 399.42
  4. Step 4: Simplify right side
    403.07x = 240,077.38
  5. Step 5: Solve for x
    x = 240,077.38/403.07
  6. Step 6: Final answer
    x = 595.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.