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Finding the Fourth Proportional to 453,608.40, 680,412.60 and 311,890.80

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Solution

The fourth proportional to 453,608.40, 680,412.60 and 311,890.80 is: 467,836.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,608.40 : 680,412.60 = 311,890.80 : x
  2. Step 2: Convert to fraction form
    453,608.40/680,412.60 = 311,890.80/x
  3. Step 3: Cross multiply
    453,608.40x = 680,412.60 × 311,890.80
  4. Step 4: Simplify right side
    453,608.40x = 212,214,430,144.08
  5. Step 5: Solve for x
    x = 212,214,430,144.08/453,608.40
  6. Step 6: Final answer
    x = 467,836.20

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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.