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Finding the Fourth Proportional to 604.80, 904.77 and 459

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Solution

The fourth proportional to 604.80, 904.77 and 459 is: 686.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.80 : 904.77 = 459 : x
  2. Step 2: Convert to fraction form
    604.80/904.77 = 459/x
  3. Step 3: Cross multiply
    604.80x = 904.77 × 459
  4. Step 4: Simplify right side
    604.80x = 415,289.43
  5. Step 5: Solve for x
    x = 415,289.43/604.80
  6. Step 6: Final answer
    x = 686.66

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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.