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Finding the Fourth Proportional to 1,639.07, 2,457.72 and 651.12

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Solution

The fourth proportional to 1,639.07, 2,457.72 and 651.12 is: 976.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.07 : 2,457.72 = 651.12 : x
  2. Step 2: Convert to fraction form
    1,639.07/2,457.72 = 651.12/x
  3. Step 3: Cross multiply
    1,639.07x = 2,457.72 × 651.12
  4. Step 4: Simplify right side
    1,639.07x = 1,600,270.65
  5. Step 5: Solve for x
    x = 1,600,270.65/1,639.07
  6. Step 6: Final answer
    x = 976.33

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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.