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Finding the Fourth Proportional to 371.84, 554.47 and 320.81

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Solution

The fourth proportional to 371.84, 554.47 and 320.81 is: 478.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.84 : 554.47 = 320.81 : x
  2. Step 2: Convert to fraction form
    371.84/554.47 = 320.81/x
  3. Step 3: Cross multiply
    371.84x = 554.47 × 320.81
  4. Step 4: Simplify right side
    371.84x = 177,875.95
  5. Step 5: Solve for x
    x = 177,875.95/371.84
  6. Step 6: Final answer
    x = 478.37

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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.