Home / 1,311,719.82-1,968,701.25-513,561.87

Finding the Fourth Proportional to 1,311,719.82, 1,968,701.25 and 513,561.87

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Solution

The fourth proportional to 1,311,719.82, 1,968,701.25 and 513,561.87 is: 770,781.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311,719.82 : 1,968,701.25 = 513,561.87 : x
  2. Step 2: Convert to fraction form
    1,311,719.82/1,968,701.25 = 513,561.87/x
  3. Step 3: Cross multiply
    1,311,719.82x = 1,968,701.25 × 513,561.87
  4. Step 4: Simplify right side
    1,311,719.82x = 1,011,049,895,421.34
  5. Step 5: Solve for x
    x = 1,011,049,895,421.34/1,311,719.82
  6. Step 6: Final answer
    x = 770,781.90

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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.