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Finding the Fourth Proportional to 52.29, 72.16 and 28.98

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Solution

The fourth proportional to 52.29, 72.16 and 28.98 is: 39.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.29 : 72.16 = 28.98 : x
  2. Step 2: Convert to fraction form
    52.29/72.16 = 28.98/x
  3. Step 3: Cross multiply
    52.29x = 72.16 × 28.98
  4. Step 4: Simplify right side
    52.29x = 2,090.84
  5. Step 5: Solve for x
    x = 2,090.84/52.29
  6. Step 6: Final answer
    x = 39.99

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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.