Home / 721,932.20-1,081,731.90-455,215.40

Finding the Fourth Proportional to 721,932.20, 1,081,731.90 and 455,215.40

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Solution

The fourth proportional to 721,932.20, 1,081,731.90 and 455,215.40 is: 682,087.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,932.20 : 1,081,731.90 = 455,215.40 : x
  2. Step 2: Convert to fraction form
    721,932.20/1,081,731.90 = 455,215.40/x
  3. Step 3: Cross multiply
    721,932.20x = 1,081,731.90 × 455,215.40
  4. Step 4: Simplify right side
    721,932.20x = 492,421,019,551.26
  5. Step 5: Solve for x
    x = 492,421,019,551.26/721,932.20
  6. Step 6: Final answer
    x = 682,087.62

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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.