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Finding the Fourth Proportional to 993,731,661.10, 1,371,293,731.60 and 547,693,672.87

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Solution

The fourth proportional to 993,731,661.10, 1,371,293,731.60 and 547,693,672.87 is: 755,786,425.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    993,731,661.10 : 1,371,293,731.60 = 547,693,672.87 : x
  2. Step 2: Convert to fraction form
    993,731,661.10/1,371,293,731.60 = 547,693,672.87/x
  3. Step 3: Cross multiply
    993,731,661.10x = 1,371,293,731.60 × 547,693,672.87
  4. Step 4: Simplify right side
    993,731,661.10x = 751,048,900,443,611,904
  5. Step 5: Solve for x
    x = 751,048,900,443,611,904/993,731,661.10
  6. Step 6: Final answer
    x = 755,786,425.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.