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Finding the Fourth Proportional to 43.15, 64.98 and 35.99

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Solution

The fourth proportional to 43.15, 64.98 and 35.99 is: 54.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.15 : 64.98 = 35.99 : x
  2. Step 2: Convert to fraction form
    43.15/64.98 = 35.99/x
  3. Step 3: Cross multiply
    43.15x = 64.98 × 35.99
  4. Step 4: Simplify right side
    43.15x = 2,338.45
  5. Step 5: Solve for x
    x = 2,338.45/43.15
  6. Step 6: Final answer
    x = 54.20

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.