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Finding the Fourth Proportional to 448.36, 619.72 and 395.50

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Solution

The fourth proportional to 448.36, 619.72 and 395.50 is: 546.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.36 : 619.72 = 395.50 : x
  2. Step 2: Convert to fraction form
    448.36/619.72 = 395.50/x
  3. Step 3: Cross multiply
    448.36x = 619.72 × 395.50
  4. Step 4: Simplify right side
    448.36x = 245,099.26
  5. Step 5: Solve for x
    x = 245,099.26/448.36
  6. Step 6: Final answer
    x = 546.66

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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.