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Finding the Fourth Proportional to 665,057.60, 997,586.40 and 487,910.60

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Solution

The fourth proportional to 665,057.60, 997,586.40 and 487,910.60 is: 731,865.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,057.60 : 997,586.40 = 487,910.60 : x
  2. Step 2: Convert to fraction form
    665,057.60/997,586.40 = 487,910.60/x
  3. Step 3: Cross multiply
    665,057.60x = 997,586.40 × 487,910.60
  4. Step 4: Simplify right side
    665,057.60x = 486,732,978,975.84
  5. Step 5: Solve for x
    x = 486,732,978,975.84/665,057.60
  6. Step 6: Final answer
    x = 731,865.90

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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.