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Finding the Fourth Proportional to 356.37, 491.30 and 348.60

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Solution

The fourth proportional to 356.37, 491.30 and 348.60 is: 480.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.37 : 491.30 = 348.60 : x
  2. Step 2: Convert to fraction form
    356.37/491.30 = 348.60/x
  3. Step 3: Cross multiply
    356.37x = 491.30 × 348.60
  4. Step 4: Simplify right side
    356.37x = 171,268.59
  5. Step 5: Solve for x
    x = 171,268.59/356.37
  6. Step 6: Final answer
    x = 480.60

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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.