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Finding the Fourth Proportional to 905.95, 1,358.98 and 443.95

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Solution

The fourth proportional to 905.95, 1,358.98 and 443.95 is: 665.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.95 : 1,358.98 = 443.95 : x
  2. Step 2: Convert to fraction form
    905.95/1,358.98 = 443.95/x
  3. Step 3: Cross multiply
    905.95x = 1,358.98 × 443.95
  4. Step 4: Simplify right side
    905.95x = 603,314.66
  5. Step 5: Solve for x
    x = 603,314.66/905.95
  6. Step 6: Final answer
    x = 665.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.