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Finding the Fourth Proportional to 678,522.81, 936,295.21 and 392,036.75

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Solution

The fourth proportional to 678,522.81, 936,295.21 and 392,036.75 is: 540,972.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,522.81 : 936,295.21 = 392,036.75 : x
  2. Step 2: Convert to fraction form
    678,522.81/936,295.21 = 392,036.75/x
  3. Step 3: Cross multiply
    678,522.81x = 936,295.21 × 392,036.75
  4. Step 4: Simplify right side
    678,522.81x = 367,062,130,488.65
  5. Step 5: Solve for x
    x = 367,062,130,488.65/678,522.81
  6. Step 6: Final answer
    x = 540,972.42

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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.