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Finding the Fourth Proportional to 1,444.21, 2,164.51 and 621.54

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Solution

The fourth proportional to 1,444.21, 2,164.51 and 621.54 is: 931.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,444.21 : 2,164.51 = 621.54 : x
  2. Step 2: Convert to fraction form
    1,444.21/2,164.51 = 621.54/x
  3. Step 3: Cross multiply
    1,444.21x = 2,164.51 × 621.54
  4. Step 4: Simplify right side
    1,444.21x = 1,345,326.44
  5. Step 5: Solve for x
    x = 1,345,326.44/1,444.21
  6. Step 6: Final answer
    x = 931.53

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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.