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Finding the Fourth Proportional to 877, 1,210.38 and 644.44

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Solution

The fourth proportional to 877, 1,210.38 and 644.44 is: 889.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    877 : 1,210.38 = 644.44 : x
  2. Step 2: Convert to fraction form
    877/1,210.38 = 644.44/x
  3. Step 3: Cross multiply
    877x = 1,210.38 × 644.44
  4. Step 4: Simplify right side
    877x = 780,017.29
  5. Step 5: Solve for x
    x = 780,017.29/877
  6. Step 6: Final answer
    x = 889.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.