Home / 711,877,911.36-982,399,375.92-394,343,020.80

Finding the Fourth Proportional to 711,877,911.36, 982,399,375.92 and 394,343,020.80

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Solution

The fourth proportional to 711,877,911.36, 982,399,375.92 and 394,343,020.80 is: 544,197,721.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,877,911.36 : 982,399,375.92 = 394,343,020.80 : x
  2. Step 2: Convert to fraction form
    711,877,911.36/982,399,375.92 = 394,343,020.80/x
  3. Step 3: Cross multiply
    711,877,911.36x = 982,399,375.92 × 394,343,020.80
  4. Step 4: Simplify right side
    711,877,911.36x = 387,402,337,532,327,552
  5. Step 5: Solve for x
    x = 387,402,337,532,327,552/711,877,911.36
  6. Step 6: Final answer
    x = 544,197,721.76

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1.5x scale

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.