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Finding the Fourth Proportional to 1,242,697,986.72, 1,714,959,579.48 and 678,219,073.56

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Solution

The fourth proportional to 1,242,697,986.72, 1,714,959,579.48 and 678,219,073.56 is: 935,962,164.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242,697,986.72 : 1,714,959,579.48 = 678,219,073.56 : x
  2. Step 2: Convert to fraction form
    1,242,697,986.72/1,714,959,579.48 = 678,219,073.56/x
  3. Step 3: Cross multiply
    1,242,697,986.72x = 1,714,959,579.48 × 678,219,073.56
  4. Step 4: Simplify right side
    1,242,697,986.72x = 1,163,118,297,187,772,672
  5. Step 5: Solve for x
    x = 1,163,118,297,187,772,672/1,242,697,986.72
  6. Step 6: Final answer
    x = 935,962,164.27

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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.