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Finding the Fourth Proportional to 605,426.50, 835,568.76 and 391,189.60

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Solution

The fourth proportional to 605,426.50, 835,568.76 and 391,189.60 is: 539,893.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,426.50 : 835,568.76 = 391,189.60 : x
  2. Step 2: Convert to fraction form
    605,426.50/835,568.76 = 391,189.60/x
  3. Step 3: Cross multiply
    605,426.50x = 835,568.76 × 391,189.60
  4. Step 4: Simplify right side
    605,426.50x = 326,865,808,996.90
  5. Step 5: Solve for x
    x = 326,865,808,996.90/605,426.50
  6. Step 6: Final answer
    x = 539,893.46

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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.