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Finding the Fourth Proportional to 949.44, 1,423.88 and 401.60

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Solution

The fourth proportional to 949.44, 1,423.88 and 401.60 is: 602.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.44 : 1,423.88 = 401.60 : x
  2. Step 2: Convert to fraction form
    949.44/1,423.88 = 401.60/x
  3. Step 3: Cross multiply
    949.44x = 1,423.88 × 401.60
  4. Step 4: Simplify right side
    949.44x = 571,830.21
  5. Step 5: Solve for x
    x = 571,830.21/949.44
  6. Step 6: Final answer
    x = 602.28

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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.