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Finding the Fourth Proportional to 442.15, 661.86 and 376.54

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Solution

The fourth proportional to 442.15, 661.86 and 376.54 is: 563.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.15 : 661.86 = 376.54 : x
  2. Step 2: Convert to fraction form
    442.15/661.86 = 376.54/x
  3. Step 3: Cross multiply
    442.15x = 661.86 × 376.54
  4. Step 4: Simplify right side
    442.15x = 249,218.42
  5. Step 5: Solve for x
    x = 249,218.42/442.15
  6. Step 6: Final answer
    x = 563.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.