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Finding the Fourth Proportional to 626,539.60, 939,809.40 and 361,118.80

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Solution

The fourth proportional to 626,539.60, 939,809.40 and 361,118.80 is: 541,678.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,539.60 : 939,809.40 = 361,118.80 : x
  2. Step 2: Convert to fraction form
    626,539.60/939,809.40 = 361,118.80/x
  3. Step 3: Cross multiply
    626,539.60x = 939,809.40 × 361,118.80
  4. Step 4: Simplify right side
    626,539.60x = 339,382,842,756.72
  5. Step 5: Solve for x
    x = 339,382,842,756.72/626,539.60
  6. Step 6: Final answer
    x = 541,678.20

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Double scale
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Similar ratio
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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.