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Finding the Fourth Proportional to 664,990.80, 997,615.80 and 265,563.60

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Solution

The fourth proportional to 664,990.80, 997,615.80 and 265,563.60 is: 398,397.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,990.80 : 997,615.80 = 265,563.60 : x
  2. Step 2: Convert to fraction form
    664,990.80/997,615.80 = 265,563.60/x
  3. Step 3: Cross multiply
    664,990.80x = 997,615.80 × 265,563.60
  4. Step 4: Simplify right side
    664,990.80x = 264,930,443,264.88
  5. Step 5: Solve for x
    x = 264,930,443,264.88/664,990.80
  6. Step 6: Final answer
    x = 398,397.16

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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.