Home / 428,500,257.67-590,732,603.94-287,396,693.46

Finding the Fourth Proportional to 428,500,257.67, 590,732,603.94 and 287,396,693.46

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Solution

The fourth proportional to 428,500,257.67, 590,732,603.94 and 287,396,693.46 is: 396,206,522.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,500,257.67 : 590,732,603.94 = 287,396,693.46 : x
  2. Step 2: Convert to fraction form
    428,500,257.67/590,732,603.94 = 287,396,693.46/x
  3. Step 3: Cross multiply
    428,500,257.67x = 590,732,603.94 × 287,396,693.46
  4. Step 4: Simplify right side
    428,500,257.67x = 169,774,597,092,449,504
  5. Step 5: Solve for x
    x = 169,774,597,092,449,504/428,500,257.67
  6. Step 6: Final answer
    x = 396,206,522.76

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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.