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Finding the Fourth Proportional to 886,709.40, 1,330,236.90 and 354,139.80

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Solution

The fourth proportional to 886,709.40, 1,330,236.90 and 354,139.80 is: 531,278.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,709.40 : 1,330,236.90 = 354,139.80 : x
  2. Step 2: Convert to fraction form
    886,709.40/1,330,236.90 = 354,139.80/x
  3. Step 3: Cross multiply
    886,709.40x = 1,330,236.90 × 354,139.80
  4. Step 4: Simplify right side
    886,709.40x = 471,089,829,718.62
  5. Step 5: Solve for x
    x = 471,089,829,718.62/886,709.40
  6. Step 6: Final answer
    x = 531,278.71

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1.5x scale

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.