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Finding the Fourth Proportional to 307,408.01, 424,299.11 and 209,453.30

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Solution

The fourth proportional to 307,408.01, 424,299.11 and 209,453.30 is: 289,097.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,408.01 : 424,299.11 = 209,453.30 : x
  2. Step 2: Convert to fraction form
    307,408.01/424,299.11 = 209,453.30/x
  3. Step 3: Cross multiply
    307,408.01x = 424,299.11 × 209,453.30
  4. Step 4: Simplify right side
    307,408.01x = 88,870,846,655.07
  5. Step 5: Solve for x
    x = 88,870,846,655.07/307,408.01
  6. Step 6: Final answer
    x = 289,097.37

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1.5x scale

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.