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Finding the Fourth Proportional to 53, 79.83 and 43.08

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Solution

The fourth proportional to 53, 79.83 and 43.08 is: 64.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    53 : 79.83 = 43.08 : x
  2. Step 2: Convert to fraction form
    53/79.83 = 43.08/x
  3. Step 3: Cross multiply
    53x = 79.83 × 43.08
  4. Step 4: Simplify right side
    53x = 3,439.08
  5. Step 5: Solve for x
    x = 3,439.08/53
  6. Step 6: Final answer
    x = 64.89

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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.