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Finding the Fourth Proportional to 691,804.26, 954,544.05 and 420,015.06

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Solution

The fourth proportional to 691,804.26, 954,544.05 and 420,015.06 is: 579,532.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,804.26 : 954,544.05 = 420,015.06 : x
  2. Step 2: Convert to fraction form
    691,804.26/954,544.05 = 420,015.06/x
  3. Step 3: Cross multiply
    691,804.26x = 954,544.05 × 420,015.06
  4. Step 4: Simplify right side
    691,804.26x = 400,922,876,433.39
  5. Step 5: Solve for x
    x = 400,922,876,433.39/691,804.26
  6. Step 6: Final answer
    x = 579,532.25

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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.