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Finding the Fourth Proportional to 354,313.80, 531,513.90 and 129,639.24

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Solution

The fourth proportional to 354,313.80, 531,513.90 and 129,639.24 is: 194,474.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,313.80 : 531,513.90 = 129,639.24 : x
  2. Step 2: Convert to fraction form
    354,313.80/531,513.90 = 129,639.24/x
  3. Step 3: Cross multiply
    354,313.80x = 531,513.90 × 129,639.24
  4. Step 4: Simplify right side
    354,313.80x = 68,905,058,045.44
  5. Step 5: Solve for x
    x = 68,905,058,045.44/354,313.80
  6. Step 6: Final answer
    x = 194,474.67

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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.