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Finding the Fourth Proportional to 713,619.18, 984,807.90 and 391,309.92

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Solution

The fourth proportional to 713,619.18, 984,807.90 and 391,309.92 is: 540,015.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,619.18 : 984,807.90 = 391,309.92 : x
  2. Step 2: Convert to fraction form
    713,619.18/984,807.90 = 391,309.92/x
  3. Step 3: Cross multiply
    713,619.18x = 984,807.90 × 391,309.92
  4. Step 4: Simplify right side
    713,619.18x = 385,365,100,564.37
  5. Step 5: Solve for x
    x = 385,365,100,564.37/713,619.18
  6. Step 6: Final answer
    x = 540,015.05

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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.