Home / 687,920.20-1,031,880.30-519,958.60

Finding the Fourth Proportional to 687,920.20, 1,031,880.30 and 519,958.60

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Solution

The fourth proportional to 687,920.20, 1,031,880.30 and 519,958.60 is: 779,937.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,920.20 : 1,031,880.30 = 519,958.60 : x
  2. Step 2: Convert to fraction form
    687,920.20/1,031,880.30 = 519,958.60/x
  3. Step 3: Cross multiply
    687,920.20x = 1,031,880.30 × 519,958.60
  4. Step 4: Simplify right side
    687,920.20x = 536,535,036,155.58
  5. Step 5: Solve for x
    x = 536,535,036,155.58/687,920.20
  6. Step 6: Final answer
    x = 779,937.90

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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.