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Finding the Fourth Proportional to 604, 904.12 and 420.48

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Solution

The fourth proportional to 604, 904.12 and 420.48 is: 629.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    604 : 904.12 = 420.48 : x
  2. Step 2: Convert to fraction form
    604/904.12 = 420.48/x
  3. Step 3: Cross multiply
    604x = 904.12 × 420.48
  4. Step 4: Simplify right side
    604x = 380,164.38
  5. Step 5: Solve for x
    x = 380,164.38/604
  6. Step 6: Final answer
    x = 629.41

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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.