Home / 687,860.20-1,031,790.30-519,898.60

Finding the Fourth Proportional to 687,860.20, 1,031,790.30 and 519,898.60

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Solution

The fourth proportional to 687,860.20, 1,031,790.30 and 519,898.60 is: 779,847.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,860.20 : 1,031,790.30 = 519,898.60 : x
  2. Step 2: Convert to fraction form
    687,860.20/1,031,790.30 = 519,898.60/x
  3. Step 3: Cross multiply
    687,860.20x = 1,031,790.30 × 519,898.60
  4. Step 4: Simplify right side
    687,860.20x = 536,426,332,463.58
  5. Step 5: Solve for x
    x = 536,426,332,463.58/687,860.20
  6. Step 6: Final answer
    x = 779,847.90

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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.