Home / 645,086.31-890,241.95-354,719.97

Finding the Fourth Proportional to 645,086.31, 890,241.95 and 354,719.97

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Solution

The fourth proportional to 645,086.31, 890,241.95 and 354,719.97 is: 489,526.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,086.31 : 890,241.95 = 354,719.97 : x
  2. Step 2: Convert to fraction form
    645,086.31/890,241.95 = 354,719.97/x
  3. Step 3: Cross multiply
    645,086.31x = 890,241.95 × 354,719.97
  4. Step 4: Simplify right side
    645,086.31x = 315,786,600,022.35
  5. Step 5: Solve for x
    x = 315,786,600,022.35/645,086.31
  6. Step 6: Final answer
    x = 489,526.12

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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.