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Finding the Fourth Proportional to 425,670, 638,605.23 and 126,153.06

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Solution

The fourth proportional to 425,670, 638,605.23 and 126,153.06 is: 189,259.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,670 : 638,605.23 = 126,153.06 : x
  2. Step 2: Convert to fraction form
    425,670/638,605.23 = 126,153.06/x
  3. Step 3: Cross multiply
    425,670x = 638,605.23 × 126,153.06
  4. Step 4: Simplify right side
    425,670x = 80,562,003,896.50
  5. Step 5: Solve for x
    x = 80,562,003,896.50/425,670
  6. Step 6: Final answer
    x = 189,259.29

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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.