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Finding the Fourth Proportional to 35.05, 52.50 and 19.79

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Solution

The fourth proportional to 35.05, 52.50 and 19.79 is: 29.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    35.05 : 52.50 = 19.79 : x
  2. Step 2: Convert to fraction form
    35.05/52.50 = 19.79/x
  3. Step 3: Cross multiply
    35.05x = 52.50 × 19.79
  4. Step 4: Simplify right side
    35.05x = 1,038.71
  5. Step 5: Solve for x
    x = 1,038.71/35.05
  6. Step 6: Final answer
    x = 29.64

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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.