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Finding the Fourth Proportional to 604.29, 906.16 and 421.77

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Solution

The fourth proportional to 604.29, 906.16 and 421.77 is: 632.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.29 : 906.16 = 421.77 : x
  2. Step 2: Convert to fraction form
    604.29/906.16 = 421.77/x
  3. Step 3: Cross multiply
    604.29x = 906.16 × 421.77
  4. Step 4: Simplify right side
    604.29x = 382,191.10
  5. Step 5: Solve for x
    x = 382,191.10/604.29
  6. Step 6: Final answer
    x = 632.46

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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.