Home / 820,153.20-1,228,847.40-398,521.20

Finding the Fourth Proportional to 820,153.20, 1,228,847.40 and 398,521.20

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Solution

The fourth proportional to 820,153.20, 1,228,847.40 and 398,521.20 is: 597,110.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,153.20 : 1,228,847.40 = 398,521.20 : x
  2. Step 2: Convert to fraction form
    820,153.20/1,228,847.40 = 398,521.20/x
  3. Step 3: Cross multiply
    820,153.20x = 1,228,847.40 × 398,521.20
  4. Step 4: Simplify right side
    820,153.20x = 489,721,740,464.88
  5. Step 5: Solve for x
    x = 489,721,740,464.88/820,153.20
  6. Step 6: Final answer
    x = 597,110.08

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1.5x scale

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.