Home / 428,837,339.12-643,327,756.68-336,717,361.52

Finding the Fourth Proportional to 428,837,339.12, 643,327,756.68 and 336,717,361.52

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Solution

The fourth proportional to 428,837,339.12, 643,327,756.68 and 336,717,361.52 is: 505,132,377.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,837,339.12 : 643,327,756.68 = 336,717,361.52 : x
  2. Step 2: Convert to fraction form
    428,837,339.12/643,327,756.68 = 336,717,361.52/x
  3. Step 3: Cross multiply
    428,837,339.12x = 643,327,756.68 × 336,717,361.52
  4. Step 4: Simplify right side
    428,837,339.12x = 216,619,624,821,870,112
  5. Step 5: Solve for x
    x = 216,619,624,821,870,112/428,837,339.12
  6. Step 6: Final answer
    x = 505,132,377.85

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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.