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Finding the Fourth Proportional to 626,581.80, 939,872.70 and 389,802.60

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Solution

The fourth proportional to 626,581.80, 939,872.70 and 389,802.60 is: 584,703.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,581.80 : 939,872.70 = 389,802.60 : x
  2. Step 2: Convert to fraction form
    626,581.80/939,872.70 = 389,802.60/x
  3. Step 3: Cross multiply
    626,581.80x = 939,872.70 × 389,802.60
  4. Step 4: Simplify right side
    626,581.80x = 366,364,822,129.02
  5. Step 5: Solve for x
    x = 366,364,822,129.02/626,581.80
  6. Step 6: Final answer
    x = 584,703.90

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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.