Home / 687,907.70-1,031,861.55-519,946.10

Finding the Fourth Proportional to 687,907.70, 1,031,861.55 and 519,946.10

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Solution

The fourth proportional to 687,907.70, 1,031,861.55 and 519,946.10 is: 779,919.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,907.70 : 1,031,861.55 = 519,946.10 : x
  2. Step 2: Convert to fraction form
    687,907.70/1,031,861.55 = 519,946.10/x
  3. Step 3: Cross multiply
    687,907.70x = 1,031,861.55 × 519,946.10
  4. Step 4: Simplify right side
    687,907.70x = 536,512,388,662.46
  5. Step 5: Solve for x
    x = 536,512,388,662.46/687,907.70
  6. Step 6: Final answer
    x = 779,919.15

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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.