Home / 428,330,974.04-591,277,551.78-289,290,065.36

Finding the Fourth Proportional to 428,330,974.04, 591,277,551.78 and 289,290,065.36

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Solution

The fourth proportional to 428,330,974.04, 591,277,551.78 and 289,290,065.36 is: 399,342,405.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,330,974.04 : 591,277,551.78 = 289,290,065.36 : x
  2. Step 2: Convert to fraction form
    428,330,974.04/591,277,551.78 = 289,290,065.36/x
  3. Step 3: Cross multiply
    428,330,974.04x = 591,277,551.78 × 289,290,065.36
  4. Step 4: Simplify right side
    428,330,974.04x = 171,050,721,600,336,992
  5. Step 5: Solve for x
    x = 171,050,721,600,336,992/428,330,974.04
  6. Step 6: Final answer
    x = 399,342,405.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.