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Finding the Fourth Proportional to 713,711.43, 984,934.40 and 391,418.70

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Solution

The fourth proportional to 713,711.43, 984,934.40 and 391,418.70 is: 540,164.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,711.43 : 984,934.40 = 391,418.70 : x
  2. Step 2: Convert to fraction form
    713,711.43/984,934.40 = 391,418.70/x
  3. Step 3: Cross multiply
    713,711.43x = 984,934.40 × 391,418.70
  4. Step 4: Simplify right side
    713,711.43x = 385,521,742,433.28
  5. Step 5: Solve for x
    x = 385,521,742,433.28/713,711.43
  6. Step 6: Final answer
    x = 540,164.73

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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.