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Finding the Fourth Proportional to 442.68, 608.55 and 395.58

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Solution

The fourth proportional to 442.68, 608.55 and 395.58 is: 543.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.68 : 608.55 = 395.58 : x
  2. Step 2: Convert to fraction form
    442.68/608.55 = 395.58/x
  3. Step 3: Cross multiply
    442.68x = 608.55 × 395.58
  4. Step 4: Simplify right side
    442.68x = 240,730.21
  5. Step 5: Solve for x
    x = 240,730.21/442.68
  6. Step 6: Final answer
    x = 543.80

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.