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Finding the Fourth Proportional to 49.99, 74.45 and 49.45

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Solution

The fourth proportional to 49.99, 74.45 and 49.45 is: 73.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.99 : 74.45 = 49.45 : x
  2. Step 2: Convert to fraction form
    49.99/74.45 = 49.45/x
  3. Step 3: Cross multiply
    49.99x = 74.45 × 49.45
  4. Step 4: Simplify right side
    49.99x = 3,681.55
  5. Step 5: Solve for x
    x = 3,681.55/49.99
  6. Step 6: Final answer
    x = 73.65

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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.