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Finding the Fourth Proportional to 371.32, 554.56 and 320.08

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Solution

The fourth proportional to 371.32, 554.56 and 320.08 is: 478.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.32 : 554.56 = 320.08 : x
  2. Step 2: Convert to fraction form
    371.32/554.56 = 320.08/x
  3. Step 3: Cross multiply
    371.32x = 554.56 × 320.08
  4. Step 4: Simplify right side
    371.32x = 177,503.56
  5. Step 5: Solve for x
    x = 177,503.56/371.32
  6. Step 6: Final answer
    x = 478.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.