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Finding the Fourth Proportional to 905.03, 1,355.25 and 574.95

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Solution

The fourth proportional to 905.03, 1,355.25 and 574.95 is: 860.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.03 : 1,355.25 = 574.95 : x
  2. Step 2: Convert to fraction form
    905.03/1,355.25 = 574.95/x
  3. Step 3: Cross multiply
    905.03x = 1,355.25 × 574.95
  4. Step 4: Simplify right side
    905.03x = 779,200.99
  5. Step 5: Solve for x
    x = 779,200.99/905.03
  6. Step 6: Final answer
    x = 860.97

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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.