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Finding the Fourth Proportional to 401.58, 553.60 and 283.18

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Solution

The fourth proportional to 401.58, 553.60 and 283.18 is: 390.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.58 : 553.60 = 283.18 : x
  2. Step 2: Convert to fraction form
    401.58/553.60 = 283.18/x
  3. Step 3: Cross multiply
    401.58x = 553.60 × 283.18
  4. Step 4: Simplify right side
    401.58x = 156,768.45
  5. Step 5: Solve for x
    x = 156,768.45/401.58
  6. Step 6: Final answer
    x = 390.38

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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.