Home / 711,389,969.52-981,718,157.92-385,807,121.52

Finding the Fourth Proportional to 711,389,969.52, 981,718,157.92 and 385,807,121.52

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Solution

The fourth proportional to 711,389,969.52, 981,718,157.92 and 385,807,121.52 is: 532,413,827.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,389,969.52 : 981,718,157.92 = 385,807,121.52 : x
  2. Step 2: Convert to fraction form
    711,389,969.52/981,718,157.92 = 385,807,121.52/x
  3. Step 3: Cross multiply
    711,389,969.52x = 981,718,157.92 × 385,807,121.52
  4. Step 4: Simplify right side
    711,389,969.52x = 378,753,856,651,031,936
  5. Step 5: Solve for x
    x = 378,753,856,651,031,936/711,389,969.52
  6. Step 6: Final answer
    x = 532,413,827.69

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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.