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Finding the Fourth Proportional to 679,474,231.51, 937,659,737.60 and 393,377,820.88

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Solution

The fourth proportional to 679,474,231.51, 937,659,737.60 and 393,377,820.88 is: 542,852,881.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,474,231.51 : 937,659,737.60 = 393,377,820.88 : x
  2. Step 2: Convert to fraction form
    679,474,231.51/937,659,737.60 = 393,377,820.88/x
  3. Step 3: Cross multiply
    679,474,231.51x = 937,659,737.60 × 393,377,820.88
  4. Step 4: Simplify right side
    679,474,231.51x = 368,854,544,304,000,576
  5. Step 5: Solve for x
    x = 368,854,544,304,000,576/679,474,231.51
  6. Step 6: Final answer
    x = 542,852,881.24

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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.