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Finding the Fourth Proportional to 294.86, 406.60 and 253.55

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Solution

The fourth proportional to 294.86, 406.60 and 253.55 is: 349.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.86 : 406.60 = 253.55 : x
  2. Step 2: Convert to fraction form
    294.86/406.60 = 253.55/x
  3. Step 3: Cross multiply
    294.86x = 406.60 × 253.55
  4. Step 4: Simplify right side
    294.86x = 103,090.76
  5. Step 5: Solve for x
    x = 103,090.76/294.86
  6. Step 6: Final answer
    x = 349.63

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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.