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Finding the Fourth Proportional to 1,128,222,546.72, 1,691,443,775.88 and 712,823,796.32

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Solution

The fourth proportional to 1,128,222,546.72, 1,691,443,775.88 and 712,823,796.32 is: 1,068,673,354.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128,222,546.72 : 1,691,443,775.88 = 712,823,796.32 : x
  2. Step 2: Convert to fraction form
    1,128,222,546.72/1,691,443,775.88 = 712,823,796.32/x
  3. Step 3: Cross multiply
    1,128,222,546.72x = 1,691,443,775.88 × 712,823,796.32
  4. Step 4: Simplify right side
    1,128,222,546.72x = 1,205,701,373,584,616,960
  5. Step 5: Solve for x
    x = 1,205,701,373,584,616,960/1,128,222,546.72
  6. Step 6: Final answer
    x = 1,068,673,354.46

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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.