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Finding the Fourth Proportional to 1,363.35, 2,045.28 and 438.92

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Solution

The fourth proportional to 1,363.35, 2,045.28 and 438.92 is: 658.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,363.35 : 2,045.28 = 438.92 : x
  2. Step 2: Convert to fraction form
    1,363.35/2,045.28 = 438.92/x
  3. Step 3: Cross multiply
    1,363.35x = 2,045.28 × 438.92
  4. Step 4: Simplify right side
    1,363.35x = 897,704.07
  5. Step 5: Solve for x
    x = 897,704.07/1,363.35
  6. Step 6: Final answer
    x = 658.45

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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.