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Finding the Fourth Proportional to 980,098.56, 1,351,296 and 640,028.16

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Solution

The fourth proportional to 980,098.56, 1,351,296 and 640,028.16 is: 882,429.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    980,098.56 : 1,351,296 = 640,028.16 : x
  2. Step 2: Convert to fraction form
    980,098.56/1,351,296 = 640,028.16/x
  3. Step 3: Cross multiply
    980,098.56x = 1,351,296 × 640,028.16
  4. Step 4: Simplify right side
    980,098.56x = 864,867,492,495.36
  5. Step 5: Solve for x
    x = 864,867,492,495.36/980,098.56
  6. Step 6: Final answer
    x = 882,429.10

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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.