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Finding the Fourth Proportional to 401.16, 601.28 and 355.60

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Solution

The fourth proportional to 401.16, 601.28 and 355.60 is: 532.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.16 : 601.28 = 355.60 : x
  2. Step 2: Convert to fraction form
    401.16/601.28 = 355.60/x
  3. Step 3: Cross multiply
    401.16x = 601.28 × 355.60
  4. Step 4: Simplify right side
    401.16x = 213,813.39
  5. Step 5: Solve for x
    x = 213,813.39/401.16
  6. Step 6: Final answer
    x = 532.99

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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.