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Finding the Fourth Proportional to 689,606,410.80, 951,677,003.64 and 376,360,728.72

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Solution

The fourth proportional to 689,606,410.80, 951,677,003.64 and 376,360,728.72 is: 519,388,806.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,606,410.80 : 951,677,003.64 = 376,360,728.72 : x
  2. Step 2: Convert to fraction form
    689,606,410.80/951,677,003.64 = 376,360,728.72/x
  3. Step 3: Cross multiply
    689,606,410.80x = 951,677,003.64 × 376,360,728.72
  4. Step 4: Simplify right side
    689,606,410.80x = 358,173,850,596,016,512
  5. Step 5: Solve for x
    x = 358,173,850,596,016,512/689,606,410.80
  6. Step 6: Final answer
    x = 519,388,806.41

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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.