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Finding the Fourth Proportional to 448.50, 618.12 and 395.58

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Solution

The fourth proportional to 448.50, 618.12 and 395.58 is: 545.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.50 : 618.12 = 395.58 : x
  2. Step 2: Convert to fraction form
    448.50/618.12 = 395.58/x
  3. Step 3: Cross multiply
    448.50x = 618.12 × 395.58
  4. Step 4: Simplify right side
    448.50x = 244,515.91
  5. Step 5: Solve for x
    x = 244,515.91/448.50
  6. Step 6: Final answer
    x = 545.19

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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.