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Finding the Fourth Proportional to 371.40, 558.30 and 342.60

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Solution

The fourth proportional to 371.40, 558.30 and 342.60 is: 515.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.40 : 558.30 = 342.60 : x
  2. Step 2: Convert to fraction form
    371.40/558.30 = 342.60/x
  3. Step 3: Cross multiply
    371.40x = 558.30 × 342.60
  4. Step 4: Simplify right side
    371.40x = 191,273.58
  5. Step 5: Solve for x
    x = 191,273.58/371.40
  6. Step 6: Final answer
    x = 515.01

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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.