Home / 1,387,243.72-2,080,865.58-389,971.72

Finding the Fourth Proportional to 1,387,243.72, 2,080,865.58 and 389,971.72

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Solution

The fourth proportional to 1,387,243.72, 2,080,865.58 and 389,971.72 is: 584,957.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,243.72 : 2,080,865.58 = 389,971.72 : x
  2. Step 2: Convert to fraction form
    1,387,243.72/2,080,865.58 = 389,971.72/x
  3. Step 3: Cross multiply
    1,387,243.72x = 2,080,865.58 × 389,971.72
  4. Step 4: Simplify right side
    1,387,243.72x = 811,478,729,321.40
  5. Step 5: Solve for x
    x = 811,478,729,321.40/1,387,243.72
  6. Step 6: Final answer
    x = 584,957.58

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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.