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Finding the Fourth Proportional to 335.48, 460.90 and 321.20

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Solution

The fourth proportional to 335.48, 460.90 and 321.20 is: 441.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    335.48 : 460.90 = 321.20 : x
  2. Step 2: Convert to fraction form
    335.48/460.90 = 321.20/x
  3. Step 3: Cross multiply
    335.48x = 460.90 × 321.20
  4. Step 4: Simplify right side
    335.48x = 148,041.08
  5. Step 5: Solve for x
    x = 148,041.08/335.48
  6. Step 6: Final answer
    x = 441.28

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.