Home / 645,087.31-890,243.33-354,720.97

Finding the Fourth Proportional to 645,087.31, 890,243.33 and 354,720.97

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Solution

The fourth proportional to 645,087.31, 890,243.33 and 354,720.97 is: 489,527.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,087.31 : 890,243.33 = 354,720.97 : x
  2. Step 2: Convert to fraction form
    645,087.31/890,243.33 = 354,720.97/x
  3. Step 3: Cross multiply
    645,087.31x = 890,243.33 × 354,720.97
  4. Step 4: Simplify right side
    645,087.31x = 315,787,977,553.63
  5. Step 5: Solve for x
    x = 315,787,977,553.63/645,087.31
  6. Step 6: Final answer
    x = 489,527.50

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1.5x scale

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.