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Finding the Fourth Proportional to 656, 904.04 and 422.72

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Solution

The fourth proportional to 656, 904.04 and 422.72 is: 582.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    656 : 904.04 = 422.72 : x
  2. Step 2: Convert to fraction form
    656/904.04 = 422.72/x
  3. Step 3: Cross multiply
    656x = 904.04 × 422.72
  4. Step 4: Simplify right side
    656x = 382,155.79
  5. Step 5: Solve for x
    x = 382,155.79/656
  6. Step 6: Final answer
    x = 582.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.