Home / 428,930,283.60-643,491,675.27-137,813,989.68

Finding the Fourth Proportional to 428,930,283.60, 643,491,675.27 and 137,813,989.68

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Solution

The fourth proportional to 428,930,283.60, 643,491,675.27 and 137,813,989.68 is: 206,751,909.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,930,283.60 : 643,491,675.27 = 137,813,989.68 : x
  2. Step 2: Convert to fraction form
    428,930,283.60/643,491,675.27 = 137,813,989.68/x
  3. Step 3: Cross multiply
    428,930,283.60x = 643,491,675.27 × 137,813,989.68
  4. Step 4: Simplify right side
    428,930,283.60x = 88,682,155,094,825,696
  5. Step 5: Solve for x
    x = 88,682,155,094,825,696/428,930,283.60
  6. Step 6: Final answer
    x = 206,751,909.31

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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.