Home / 711,389,959.50-981,718,144.12-385,807,111.50

Finding the Fourth Proportional to 711,389,959.50, 981,718,144.12 and 385,807,111.50

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Solution

The fourth proportional to 711,389,959.50, 981,718,144.12 and 385,807,111.50 is: 532,413,813.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,389,959.50 : 981,718,144.12 = 385,807,111.50 : x
  2. Step 2: Convert to fraction form
    711,389,959.50/981,718,144.12 = 385,807,111.50/x
  3. Step 3: Cross multiply
    711,389,959.50x = 981,718,144.12 × 385,807,111.50
  4. Step 4: Simplify right side
    711,389,959.50x = 378,753,841,490,077,888
  5. Step 5: Solve for x
    x = 378,753,841,490,077,888/711,389,959.50
  6. Step 6: Final answer
    x = 532,413,813.88

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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.