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Finding the Fourth Proportional to 626,612.80, 939,919.20 and 414,036.40

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Solution

The fourth proportional to 626,612.80, 939,919.20 and 414,036.40 is: 621,054.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,612.80 : 939,919.20 = 414,036.40 : x
  2. Step 2: Convert to fraction form
    626,612.80/939,919.20 = 414,036.40/x
  3. Step 3: Cross multiply
    626,612.80x = 939,919.20 × 414,036.40
  4. Step 4: Simplify right side
    626,612.80x = 389,160,761,858.88
  5. Step 5: Solve for x
    x = 389,160,761,858.88/626,612.80
  6. Step 6: Final answer
    x = 621,054.60

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Half scale
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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.