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Finding the Fourth Proportional to 713,685.51, 984,899.43 and 391,376.34

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Solution

The fourth proportional to 713,685.51, 984,899.43 and 391,376.34 is: 540,106.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,685.51 : 984,899.43 = 391,376.34 : x
  2. Step 2: Convert to fraction form
    713,685.51/984,899.43 = 391,376.34/x
  3. Step 3: Cross multiply
    713,685.51x = 984,899.43 × 391,376.34
  4. Step 4: Simplify right side
    713,685.51x = 385,466,334,181.49
  5. Step 5: Solve for x
    x = 385,466,334,181.49/713,685.51
  6. Step 6: Final answer
    x = 540,106.71

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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.