Home / 428,744,383.80-643,116,575.70-265,485,708.60

Finding the Fourth Proportional to 428,744,383.80, 643,116,575.70 and 265,485,708.60

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Solution

The fourth proportional to 428,744,383.80, 643,116,575.70 and 265,485,708.60 is: 398,228,562.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,744,383.80 : 643,116,575.70 = 265,485,708.60 : x
  2. Step 2: Convert to fraction form
    428,744,383.80/643,116,575.70 = 265,485,708.60/x
  3. Step 3: Cross multiply
    428,744,383.80x = 643,116,575.70 × 265,485,708.60
  4. Step 4: Simplify right side
    428,744,383.80x = 170,738,259,812,120,064
  5. Step 5: Solve for x
    x = 170,738,259,812,120,064/428,744,383.80
  6. Step 6: Final answer
    x = 398,228,562.90

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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.