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Finding the Fourth Proportional to 332.10, 455.37 and 320.51

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Solution

The fourth proportional to 332.10, 455.37 and 320.51 is: 439.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    332.10 : 455.37 = 320.51 : x
  2. Step 2: Convert to fraction form
    332.10/455.37 = 320.51/x
  3. Step 3: Cross multiply
    332.10x = 455.37 × 320.51
  4. Step 4: Simplify right side
    332.10x = 145,948.36
  5. Step 5: Solve for x
    x = 145,948.36/332.10
  6. Step 6: Final answer
    x = 439.47

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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.