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Finding the Fourth Proportional to 407.52, 561.78 and 333.72

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Solution

The fourth proportional to 407.52, 561.78 and 333.72 is: 460.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.52 : 561.78 = 333.72 : x
  2. Step 2: Convert to fraction form
    407.52/561.78 = 333.72/x
  3. Step 3: Cross multiply
    407.52x = 561.78 × 333.72
  4. Step 4: Simplify right side
    407.52x = 187,477.22
  5. Step 5: Solve for x
    x = 187,477.22/407.52
  6. Step 6: Final answer
    x = 460.04

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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.