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Finding the Fourth Proportional to 713,505.84, 984,611.40 and 391,208.40

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Solution

The fourth proportional to 713,505.84, 984,611.40 and 391,208.40 is: 539,852.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,505.84 : 984,611.40 = 391,208.40 : x
  2. Step 2: Convert to fraction form
    713,505.84/984,611.40 = 391,208.40/x
  3. Step 3: Cross multiply
    713,505.84x = 984,611.40 × 391,208.40
  4. Step 4: Simplify right side
    713,505.84x = 385,188,250,415.76
  5. Step 5: Solve for x
    x = 385,188,250,415.76/713,505.84
  6. Step 6: Final answer
    x = 539,852.98

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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.