Home / 690,769.32-1,035,008.46-420,078.60

Finding the Fourth Proportional to 690,769.32, 1,035,008.46 and 420,078.60

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Solution

The fourth proportional to 690,769.32, 1,035,008.46 and 420,078.60 is: 629,421.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,769.32 : 1,035,008.46 = 420,078.60 : x
  2. Step 2: Convert to fraction form
    690,769.32/1,035,008.46 = 420,078.60/x
  3. Step 3: Cross multiply
    690,769.32x = 1,035,008.46 × 420,078.60
  4. Step 4: Simplify right side
    690,769.32x = 434,784,904,864.96
  5. Step 5: Solve for x
    x = 434,784,904,864.96/690,769.32
  6. Step 6: Final answer
    x = 629,421.27

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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.