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Finding the Fourth Proportional to 713,579.20, 984,738.81 and 391,294.78

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Solution

The fourth proportional to 713,579.20, 984,738.81 and 391,294.78 is: 539,986.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,579.20 : 984,738.81 = 391,294.78 : x
  2. Step 2: Convert to fraction form
    713,579.20/984,738.81 = 391,294.78/x
  3. Step 3: Cross multiply
    713,579.20x = 984,738.81 × 391,294.78
  4. Step 4: Simplify right side
    713,579.20x = 385,323,156,016.41
  5. Step 5: Solve for x
    x = 385,323,156,016.41/713,579.20
  6. Step 6: Final answer
    x = 539,986.53

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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.