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Finding the Fourth Proportional to 713,711.25, 984,831.62 and 391,336.52

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Solution

The fourth proportional to 713,711.25, 984,831.62 and 391,336.52 is: 539,995.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,711.25 : 984,831.62 = 391,336.52 : x
  2. Step 2: Convert to fraction form
    713,711.25/984,831.62 = 391,336.52/x
  3. Step 3: Cross multiply
    713,711.25x = 984,831.62 × 391,336.52
  4. Step 4: Simplify right side
    713,711.25x = 385,400,572,075.92
  5. Step 5: Solve for x
    x = 385,400,572,075.92/713,711.25
  6. Step 6: Final answer
    x = 539,995.09

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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.