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Finding the Fourth Proportional to 1,363.95, 2,045.79 and 439.25

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Solution

The fourth proportional to 1,363.95, 2,045.79 and 439.25 is: 658.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,363.95 : 2,045.79 = 439.25 : x
  2. Step 2: Convert to fraction form
    1,363.95/2,045.79 = 439.25/x
  3. Step 3: Cross multiply
    1,363.95x = 2,045.79 × 439.25
  4. Step 4: Simplify right side
    1,363.95x = 898,603.03
  5. Step 5: Solve for x
    x = 898,603.03/1,363.95
  6. Step 6: Final answer
    x = 658.82

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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.