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Finding the Fourth Proportional to 1,435,708.86, 1,981,366.32 and 791,128.68

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Solution

The fourth proportional to 1,435,708.86, 1,981,366.32 and 791,128.68 is: 1,091,806.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435,708.86 : 1,981,366.32 = 791,128.68 : x
  2. Step 2: Convert to fraction form
    1,435,708.86/1,981,366.32 = 791,128.68/x
  3. Step 3: Cross multiply
    1,435,708.86x = 1,981,366.32 × 791,128.68
  4. Step 4: Simplify right side
    1,435,708.86x = 1,567,515,721,338.06
  5. Step 5: Solve for x
    x = 1,567,515,721,338.06/1,435,708.86
  6. Step 6: Final answer
    x = 1,091,806.12

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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.