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Finding the Fourth Proportional to 1,617.93, 2,428.29 and 644.73

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Solution

The fourth proportional to 1,617.93, 2,428.29 and 644.73 is: 967.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,617.93 : 2,428.29 = 644.73 : x
  2. Step 2: Convert to fraction form
    1,617.93/2,428.29 = 644.73/x
  3. Step 3: Cross multiply
    1,617.93x = 2,428.29 × 644.73
  4. Step 4: Simplify right side
    1,617.93x = 1,565,591.41
  5. Step 5: Solve for x
    x = 1,565,591.41/1,617.93
  6. Step 6: Final answer
    x = 967.65

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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.