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Finding the Fourth Proportional to 713,747.80, 984,976.82 and 391,460.20

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Solution

The fourth proportional to 713,747.80, 984,976.82 and 391,460.20 is: 540,217.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,747.80 : 984,976.82 = 391,460.20 : x
  2. Step 2: Convert to fraction form
    713,747.80/984,976.82 = 391,460.20/x
  3. Step 3: Cross multiply
    713,747.80x = 984,976.82 × 391,460.20
  4. Step 4: Simplify right side
    713,747.80x = 385,579,222,952.56
  5. Step 5: Solve for x
    x = 385,579,222,952.56/713,747.80
  6. Step 6: Final answer
    x = 540,217.74

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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.