Home / 689,895.20-1,034,891.40-390,519.20

Finding the Fourth Proportional to 689,895.20, 1,034,891.40 and 390,519.20

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Solution

The fourth proportional to 689,895.20, 1,034,891.40 and 390,519.20 is: 585,806.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,895.20 : 1,034,891.40 = 390,519.20 : x
  2. Step 2: Convert to fraction form
    689,895.20/1,034,891.40 = 390,519.20/x
  3. Step 3: Cross multiply
    689,895.20x = 1,034,891.40 × 390,519.20
  4. Step 4: Simplify right side
    689,895.20x = 404,144,961,614.88
  5. Step 5: Solve for x
    x = 404,144,961,614.88/689,895.20
  6. Step 6: Final answer
    x = 585,806.31

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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.