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Finding the Fourth Proportional to 819,558.30, 1,230,335.85 and 520,038.30

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Solution

The fourth proportional to 819,558.30, 1,230,335.85 and 520,038.30 is: 780,690.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,558.30 : 1,230,335.85 = 520,038.30 : x
  2. Step 2: Convert to fraction form
    819,558.30/1,230,335.85 = 520,038.30/x
  3. Step 3: Cross multiply
    819,558.30x = 1,230,335.85 × 520,038.30
  4. Step 4: Simplify right side
    819,558.30x = 639,821,763,863.06
  5. Step 5: Solve for x
    x = 639,821,763,863.06/819,558.30
  6. Step 6: Final answer
    x = 780,690.97

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.