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Finding the Fourth Proportional to 35.78, 49.39 and 25.45

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Solution

The fourth proportional to 35.78, 49.39 and 25.45 is: 35.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    35.78 : 49.39 = 25.45 : x
  2. Step 2: Convert to fraction form
    35.78/49.39 = 25.45/x
  3. Step 3: Cross multiply
    35.78x = 49.39 × 25.45
  4. Step 4: Simplify right side
    35.78x = 1,256.79
  5. Step 5: Solve for x
    x = 1,256.79/35.78
  6. Step 6: Final answer
    x = 35.13

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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.