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Finding the Fourth Proportional to 439,487.01, 659,012.31 and 139,928.67

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Solution

The fourth proportional to 439,487.01, 659,012.31 and 139,928.67 is: 209,823.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,487.01 : 659,012.31 = 139,928.67 : x
  2. Step 2: Convert to fraction form
    439,487.01/659,012.31 = 139,928.67/x
  3. Step 3: Cross multiply
    439,487.01x = 659,012.31 × 139,928.67
  4. Step 4: Simplify right side
    439,487.01x = 92,214,716,051.93
  5. Step 5: Solve for x
    x = 92,214,716,051.93/439,487.01
  6. Step 6: Final answer
    x = 209,823.53

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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.