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Finding the Fourth Proportional to 919,092,415.20, 1,379,310,469.20 and 646,994,623.20

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Solution

The fourth proportional to 919,092,415.20, 1,379,310,469.20 and 646,994,623.20 is: 970,964,880.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,092,415.20 : 1,379,310,469.20 = 646,994,623.20 : x
  2. Step 2: Convert to fraction form
    919,092,415.20/1,379,310,469.20 = 646,994,623.20/x
  3. Step 3: Cross multiply
    919,092,415.20x = 1,379,310,469.20 × 646,994,623.20
  4. Step 4: Simplify right side
    919,092,415.20x = 892,406,457,295,869,312
  5. Step 5: Solve for x
    x = 892,406,457,295,869,312/919,092,415.20
  6. Step 6: Final answer
    x = 970,964,880.72

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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.