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Finding the Fourth Proportional to 611,847,906.30, 917,771,859.45 and 528,624,245.70

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Solution

The fourth proportional to 611,847,906.30, 917,771,859.45 and 528,624,245.70 is: 792,936,368.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,847,906.30 : 917,771,859.45 = 528,624,245.70 : x
  2. Step 2: Convert to fraction form
    611,847,906.30/917,771,859.45 = 528,624,245.70/x
  3. Step 3: Cross multiply
    611,847,906.30x = 917,771,859.45 × 528,624,245.70
  4. Step 4: Simplify right side
    611,847,906.30x = 485,156,456,926,442,688
  5. Step 5: Solve for x
    x = 485,156,456,926,442,688/611,847,906.30
  6. Step 6: Final answer
    x = 792,936,368.55

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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.