Home / 680,920.20-1,021,380.30-539,915.40

Finding the Fourth Proportional to 680,920.20, 1,021,380.30 and 539,915.40

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Solution

The fourth proportional to 680,920.20, 1,021,380.30 and 539,915.40 is: 809,873.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,920.20 : 1,021,380.30 = 539,915.40 : x
  2. Step 2: Convert to fraction form
    680,920.20/1,021,380.30 = 539,915.40/x
  3. Step 3: Cross multiply
    680,920.20x = 1,021,380.30 × 539,915.40
  4. Step 4: Simplify right side
    680,920.20x = 551,458,953,226.62
  5. Step 5: Solve for x
    x = 551,458,953,226.62/680,920.20
  6. Step 6: Final answer
    x = 809,873.10

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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.