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Finding the Fourth Proportional to 1,623.81, 2,435.74 and 649.69

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Solution

The fourth proportional to 1,623.81, 2,435.74 and 649.69 is: 974.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,623.81 : 2,435.74 = 649.69 : x
  2. Step 2: Convert to fraction form
    1,623.81/2,435.74 = 649.69/x
  3. Step 3: Cross multiply
    1,623.81x = 2,435.74 × 649.69
  4. Step 4: Simplify right side
    1,623.81x = 1,582,468.21
  5. Step 5: Solve for x
    x = 1,582,468.21/1,623.81
  6. Step 6: Final answer
    x = 974.54

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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.