Home / 981,201,338.72-1,471,627,255.32-390,942,109.58

Finding the Fourth Proportional to 981,201,338.72, 1,471,627,255.32 and 390,942,109.58

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Solution

The fourth proportional to 981,201,338.72, 1,471,627,255.32 and 390,942,109.58 is: 586,343,537.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    981,201,338.72 : 1,471,627,255.32 = 390,942,109.58 : x
  2. Step 2: Convert to fraction form
    981,201,338.72/1,471,627,255.32 = 390,942,109.58/x
  3. Step 3: Cross multiply
    981,201,338.72x = 1,471,627,255.32 × 390,942,109.58
  4. Step 4: Simplify right side
    981,201,338.72x = 575,321,063,710,226,048
  5. Step 5: Solve for x
    x = 575,321,063,710,226,048/981,201,338.72
  6. Step 6: Final answer
    x = 586,343,537.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.