Home / 1,387,105.10-2,080,657.65-389,833.10

Finding the Fourth Proportional to 1,387,105.10, 2,080,657.65 and 389,833.10

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Solution

The fourth proportional to 1,387,105.10, 2,080,657.65 and 389,833.10 is: 584,749.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,105.10 : 2,080,657.65 = 389,833.10 : x
  2. Step 2: Convert to fraction form
    1,387,105.10/2,080,657.65 = 389,833.10/x
  3. Step 3: Cross multiply
    1,387,105.10x = 2,080,657.65 × 389,833.10
  4. Step 4: Simplify right side
    1,387,105.10x = 811,109,221,738.22
  5. Step 5: Solve for x
    x = 811,109,221,738.22/1,387,105.10
  6. Step 6: Final answer
    x = 584,749.65

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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.