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Finding the Fourth Proportional to 371.68, 559.36 and 307.20

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Solution

The fourth proportional to 371.68, 559.36 and 307.20 is: 462.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.68 : 559.36 = 307.20 : x
  2. Step 2: Convert to fraction form
    371.68/559.36 = 307.20/x
  3. Step 3: Cross multiply
    371.68x = 559.36 × 307.20
  4. Step 4: Simplify right side
    371.68x = 171,835.39
  5. Step 5: Solve for x
    x = 171,835.39/371.68
  6. Step 6: Final answer
    x = 462.32

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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.