Home / 426,050.80-639,076.20-215,661.40

Finding the Fourth Proportional to 426,050.80, 639,076.20 and 215,661.40

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Solution

The fourth proportional to 426,050.80, 639,076.20 and 215,661.40 is: 323,492.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,050.80 : 639,076.20 = 215,661.40 : x
  2. Step 2: Convert to fraction form
    426,050.80/639,076.20 = 215,661.40/x
  3. Step 3: Cross multiply
    426,050.80x = 639,076.20 × 215,661.40
  4. Step 4: Simplify right side
    426,050.80x = 137,824,067,998.68
  5. Step 5: Solve for x
    x = 137,824,067,998.68/426,050.80
  6. Step 6: Final answer
    x = 323,492.10

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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.