Home / 1,387,105.75-2,080,658.63-389,833.75

Finding the Fourth Proportional to 1,387,105.75, 2,080,658.63 and 389,833.75

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Solution

The fourth proportional to 1,387,105.75, 2,080,658.63 and 389,833.75 is: 584,750.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,105.75 : 2,080,658.63 = 389,833.75 : x
  2. Step 2: Convert to fraction form
    1,387,105.75/2,080,658.63 = 389,833.75/x
  3. Step 3: Cross multiply
    1,387,105.75x = 2,080,658.63 × 389,833.75
  4. Step 4: Simplify right side
    1,387,105.75x = 811,110,956,202.76
  5. Step 5: Solve for x
    x = 811,110,956,202.76/1,387,105.75
  6. Step 6: Final answer
    x = 584,750.63

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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.