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Finding the Fourth Proportional to 370.99, 511.33 and 321.10

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Solution

The fourth proportional to 370.99, 511.33 and 321.10 is: 442.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.99 : 511.33 = 321.10 : x
  2. Step 2: Convert to fraction form
    370.99/511.33 = 321.10/x
  3. Step 3: Cross multiply
    370.99x = 511.33 × 321.10
  4. Step 4: Simplify right side
    370.99x = 164,187.39
  5. Step 5: Solve for x
    x = 164,187.39/370.99
  6. Step 6: Final answer
    x = 442.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.