Home / 768,739.60-1,153,109.34-389,601.28

Finding the Fourth Proportional to 768,739.60, 1,153,109.34 and 389,601.28

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Solution

The fourth proportional to 768,739.60, 1,153,109.34 and 389,601.28 is: 584,401.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,739.60 : 1,153,109.34 = 389,601.28 : x
  2. Step 2: Convert to fraction form
    768,739.60/1,153,109.34 = 389,601.28/x
  3. Step 3: Cross multiply
    768,739.60x = 1,153,109.34 × 389,601.28
  4. Step 4: Simplify right side
    768,739.60x = 449,252,874,843.96
  5. Step 5: Solve for x
    x = 449,252,874,843.96/768,739.60
  6. Step 6: Final answer
    x = 584,401.89

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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.