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Finding the Fourth Proportional to 623,755,972.80, 934,626,189.60 and 393,312,657.60

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Solution

The fourth proportional to 623,755,972.80, 934,626,189.60 and 393,312,657.60 is: 589,333,531.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,755,972.80 : 934,626,189.60 = 393,312,657.60 : x
  2. Step 2: Convert to fraction form
    623,755,972.80/934,626,189.60 = 393,312,657.60/x
  3. Step 3: Cross multiply
    623,755,972.80x = 934,626,189.60 × 393,312,657.60
  4. Step 4: Simplify right side
    623,755,972.80x = 367,600,310,494,137,536
  5. Step 5: Solve for x
    x = 367,600,310,494,137,536/623,755,972.80
  6. Step 6: Final answer
    x = 589,333,531.90

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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.