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Finding the Fourth Proportional to 371.88, 561.15 and 356.90

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Solution

The fourth proportional to 371.88, 561.15 and 356.90 is: 538.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.88 : 561.15 = 356.90 : x
  2. Step 2: Convert to fraction form
    371.88/561.15 = 356.90/x
  3. Step 3: Cross multiply
    371.88x = 561.15 × 356.90
  4. Step 4: Simplify right side
    371.88x = 200,271.63
  5. Step 5: Solve for x
    x = 200,271.63/371.88
  6. Step 6: Final answer
    x = 538.54

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.