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Finding the Fourth Proportional to 713,406.10, 984,500.19 and 391,109.30

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Solution

The fourth proportional to 713,406.10, 984,500.19 and 391,109.30 is: 539,730.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,406.10 : 984,500.19 = 391,109.30 : x
  2. Step 2: Convert to fraction form
    713,406.10/984,500.19 = 391,109.30/x
  3. Step 3: Cross multiply
    713,406.10x = 984,500.19 × 391,109.30
  4. Step 4: Simplify right side
    713,406.10x = 385,047,180,160.77
  5. Step 5: Solve for x
    x = 385,047,180,160.77/713,406.10
  6. Step 6: Final answer
    x = 539,730.71

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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.