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Finding the Fourth Proportional to 886,685.40, 1,330,200.90 and 354,115.80

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Solution

The fourth proportional to 886,685.40, 1,330,200.90 and 354,115.80 is: 531,242.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,685.40 : 1,330,200.90 = 354,115.80 : x
  2. Step 2: Convert to fraction form
    886,685.40/1,330,200.90 = 354,115.80/x
  3. Step 3: Cross multiply
    886,685.40x = 1,330,200.90 × 354,115.80
  4. Step 4: Simplify right side
    886,685.40x = 471,045,155,864.22
  5. Step 5: Solve for x
    x = 471,045,155,864.22/886,685.40
  6. Step 6: Final answer
    x = 531,242.71

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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.