Home / 287,405,809.20-396,620,190.46-155,246,864.11

Finding the Fourth Proportional to 287,405,809.20, 396,620,190.46 and 155,246,864.11

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Solution

The fourth proportional to 287,405,809.20, 396,620,190.46 and 155,246,864.11 is: 214,240,766.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,405,809.20 : 396,620,190.46 = 155,246,864.11 : x
  2. Step 2: Convert to fraction form
    287,405,809.20/396,620,190.46 = 155,246,864.11/x
  3. Step 3: Cross multiply
    287,405,809.20x = 396,620,190.46 × 155,246,864.11
  4. Step 4: Simplify right side
    287,405,809.20x = 61,574,040,811,942,944
  5. Step 5: Solve for x
    x = 61,574,040,811,942,944/287,405,809.20
  6. Step 6: Final answer
    x = 214,240,766.33

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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.