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Finding the Fourth Proportional to 713,412.62, 984,509.15 and 391,115.82

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Solution

The fourth proportional to 713,412.62, 984,509.15 and 391,115.82 is: 539,739.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,412.62 : 984,509.15 = 391,115.82 : x
  2. Step 2: Convert to fraction form
    713,412.62/984,509.15 = 391,115.82/x
  3. Step 3: Cross multiply
    713,412.62x = 984,509.15 × 391,115.82
  4. Step 4: Simplify right side
    713,412.62x = 385,057,101,544.17
  5. Step 5: Solve for x
    x = 385,057,101,544.17/713,412.62
  6. Step 6: Final answer
    x = 539,739.69

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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.