Home / 717,149,763.79-989,656,614.09-399,623,392.83

Finding the Fourth Proportional to 717,149,763.79, 989,656,614.09 and 399,623,392.83

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Solution

The fourth proportional to 717,149,763.79, 989,656,614.09 and 399,623,392.83 is: 551,474,676.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,149,763.79 : 989,656,614.09 = 399,623,392.83 : x
  2. Step 2: Convert to fraction form
    717,149,763.79/989,656,614.09 = 399,623,392.83/x
  3. Step 3: Cross multiply
    717,149,763.79x = 989,656,614.09 × 399,623,392.83
  4. Step 4: Simplify right side
    717,149,763.79x = 395,489,933,863,016,960
  5. Step 5: Solve for x
    x = 395,489,933,863,016,960/717,149,763.79
  6. Step 6: Final answer
    x = 551,474,676.33

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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.