Home / 687,829.20-1,031,743.80-519,867.60

Finding the Fourth Proportional to 687,829.20, 1,031,743.80 and 519,867.60

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Solution

The fourth proportional to 687,829.20, 1,031,743.80 and 519,867.60 is: 779,801.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,829.20 : 1,031,743.80 = 519,867.60 : x
  2. Step 2: Convert to fraction form
    687,829.20/1,031,743.80 = 519,867.60/x
  3. Step 3: Cross multiply
    687,829.20x = 1,031,743.80 × 519,867.60
  4. Step 4: Simplify right side
    687,829.20x = 536,370,173,120.88
  5. Step 5: Solve for x
    x = 536,370,173,120.88/687,829.20
  6. Step 6: Final answer
    x = 779,801.40

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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.