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Finding the Fourth Proportional to 679,473,883.81, 937,659,262.80 and 393,377,474.88

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Solution

The fourth proportional to 679,473,883.81, 937,659,262.80 and 393,377,474.88 is: 542,852,406.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,473,883.81 : 937,659,262.80 = 393,377,474.88 : x
  2. Step 2: Convert to fraction form
    679,473,883.81/937,659,262.80 = 393,377,474.88/x
  3. Step 3: Cross multiply
    679,473,883.81x = 937,659,262.80 × 393,377,474.88
  4. Step 4: Simplify right side
    679,473,883.81x = 368,854,033,098,106,304
  5. Step 5: Solve for x
    x = 368,854,033,098,106,304/679,473,883.81
  6. Step 6: Final answer
    x = 542,852,406.67

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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.