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Finding the Fourth Proportional to 677,924.03, 935,973.41 and 420,074.60

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Solution

The fourth proportional to 677,924.03, 935,973.41 and 420,074.60 is: 579,974.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,924.03 : 935,973.41 = 420,074.60 : x
  2. Step 2: Convert to fraction form
    677,924.03/935,973.41 = 420,074.60/x
  3. Step 3: Cross multiply
    677,924.03x = 935,973.41 × 420,074.60
  4. Step 4: Simplify right side
    677,924.03x = 393,178,649,036.15
  5. Step 5: Solve for x
    x = 393,178,649,036.15/677,924.03
  6. Step 6: Final answer
    x = 579,974.50

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Double scale
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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.