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Finding the Fourth Proportional to 604.55, 904.80 and 422.30

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Solution

The fourth proportional to 604.55, 904.80 and 422.30 is: 632.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.55 : 904.80 = 422.30 : x
  2. Step 2: Convert to fraction form
    604.55/904.80 = 422.30/x
  3. Step 3: Cross multiply
    604.55x = 904.80 × 422.30
  4. Step 4: Simplify right side
    604.55x = 382,097.04
  5. Step 5: Solve for x
    x = 382,097.04/604.55
  6. Step 6: Final answer
    x = 632.04

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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.