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Finding the Fourth Proportional to 961,804.80, 1,327,052.16 and 621,864

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Solution

The fourth proportional to 961,804.80, 1,327,052.16 and 621,864 is: 858,018.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    961,804.80 : 1,327,052.16 = 621,864 : x
  2. Step 2: Convert to fraction form
    961,804.80/1,327,052.16 = 621,864/x
  3. Step 3: Cross multiply
    961,804.80x = 1,327,052.16 × 621,864
  4. Step 4: Simplify right side
    961,804.80x = 825,245,964,426.24
  5. Step 5: Solve for x
    x = 825,245,964,426.24/961,804.80
  6. Step 6: Final answer
    x = 858,018.14

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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.