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Finding the Fourth Proportional to 425,491.16, 638,295.06 and 188,828.60

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Solution

The fourth proportional to 425,491.16, 638,295.06 and 188,828.60 is: 283,268.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,491.16 : 638,295.06 = 188,828.60 : x
  2. Step 2: Convert to fraction form
    425,491.16/638,295.06 = 188,828.60/x
  3. Step 3: Cross multiply
    425,491.16x = 638,295.06 × 188,828.60
  4. Step 4: Simplify right side
    425,491.16x = 120,528,362,566.72
  5. Step 5: Solve for x
    x = 120,528,362,566.72/425,491.16
  6. Step 6: Final answer
    x = 283,268.78

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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.