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Finding the Fourth Proportional to 638,530.80, 957,661.80 and 322,690.80

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Solution

The fourth proportional to 638,530.80, 957,661.80 and 322,690.80 is: 483,968.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,530.80 : 957,661.80 = 322,690.80 : x
  2. Step 2: Convert to fraction form
    638,530.80/957,661.80 = 322,690.80/x
  3. Step 3: Cross multiply
    638,530.80x = 957,661.80 × 322,690.80
  4. Step 4: Simplify right side
    638,530.80x = 309,028,652,371.44
  5. Step 5: Solve for x
    x = 309,028,652,371.44/638,530.80
  6. Step 6: Final answer
    x = 483,968.28

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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.