Home / 690,649.64-1,035,188.88-420,181.58

Finding the Fourth Proportional to 690,649.64, 1,035,188.88 and 420,181.58

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Solution

The fourth proportional to 690,649.64, 1,035,188.88 and 420,181.58 is: 629,794.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,649.64 : 1,035,188.88 = 420,181.58 : x
  2. Step 2: Convert to fraction form
    690,649.64/1,035,188.88 = 420,181.58/x
  3. Step 3: Cross multiply
    690,649.64x = 1,035,188.88 × 420,181.58
  4. Step 4: Simplify right side
    690,649.64x = 434,967,294,020.89
  5. Step 5: Solve for x
    x = 434,967,294,020.89/690,649.64
  6. Step 6: Final answer
    x = 629,794.42

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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.