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Finding the Fourth Proportional to 403.32, 601.45 and 399.67

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Solution

The fourth proportional to 403.32, 601.45 and 399.67 is: 596.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.32 : 601.45 = 399.67 : x
  2. Step 2: Convert to fraction form
    403.32/601.45 = 399.67/x
  3. Step 3: Cross multiply
    403.32x = 601.45 × 399.67
  4. Step 4: Simplify right side
    403.32x = 240,381.52
  5. Step 5: Solve for x
    x = 240,381.52/403.32
  6. Step 6: Final answer
    x = 596.01

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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.