Home / 820,327.79-1,230,923.72-420,968.58

Finding the Fourth Proportional to 820,327.79, 1,230,923.72 and 420,968.58

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Solution

The fourth proportional to 820,327.79, 1,230,923.72 and 420,968.58 is: 631,674.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,327.79 : 1,230,923.72 = 420,968.58 : x
  2. Step 2: Convert to fraction form
    820,327.79/1,230,923.72 = 420,968.58/x
  3. Step 3: Cross multiply
    820,327.79x = 1,230,923.72 × 420,968.58
  4. Step 4: Simplify right side
    820,327.79x = 518,180,208,391.88
  5. Step 5: Solve for x
    x = 518,180,208,391.88/820,327.79
  6. Step 6: Final answer
    x = 631,674.58

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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.