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Finding the Fourth Proportional to 604.56, 904.86 and 399.36

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Solution

The fourth proportional to 604.56, 904.86 and 399.36 is: 597.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.56 : 904.86 = 399.36 : x
  2. Step 2: Convert to fraction form
    604.56/904.86 = 399.36/x
  3. Step 3: Cross multiply
    604.56x = 904.86 × 399.36
  4. Step 4: Simplify right side
    604.56x = 361,364.89
  5. Step 5: Solve for x
    x = 361,364.89/604.56
  6. Step 6: Final answer
    x = 597.73

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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.