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Finding the Fourth Proportional to 53.51, 79.95 and 43.23

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Solution

The fourth proportional to 53.51, 79.95 and 43.23 is: 64.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.51 : 79.95 = 43.23 : x
  2. Step 2: Convert to fraction form
    53.51/79.95 = 43.23/x
  3. Step 3: Cross multiply
    53.51x = 79.95 × 43.23
  4. Step 4: Simplify right side
    53.51x = 3,455.62
  5. Step 5: Solve for x
    x = 3,455.62/53.51
  6. Step 6: Final answer
    x = 64.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.