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Finding the Fourth Proportional to 869,608.80, 1,303,765.20 and 449,186.40

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Solution

The fourth proportional to 869,608.80, 1,303,765.20 and 449,186.40 is: 673,444.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,608.80 : 1,303,765.20 = 449,186.40 : x
  2. Step 2: Convert to fraction form
    869,608.80/1,303,765.20 = 449,186.40/x
  3. Step 3: Cross multiply
    869,608.80x = 1,303,765.20 × 449,186.40
  4. Step 4: Simplify right side
    869,608.80x = 585,633,596,633.28
  5. Step 5: Solve for x
    x = 585,633,596,633.28/869,608.80
  6. Step 6: Final answer
    x = 673,444.88

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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.