Home / 1,387,204.78-2,080,807.14-389,932.78

Finding the Fourth Proportional to 1,387,204.78, 2,080,807.14 and 389,932.78

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Solution

The fourth proportional to 1,387,204.78, 2,080,807.14 and 389,932.78 is: 584,899.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,204.78 : 2,080,807.14 = 389,932.78 : x
  2. Step 2: Convert to fraction form
    1,387,204.78/2,080,807.14 = 389,932.78/x
  3. Step 3: Cross multiply
    1,387,204.78x = 2,080,807.14 × 389,932.78
  4. Step 4: Simplify right side
    1,387,204.78x = 811,374,912,744.05
  5. Step 5: Solve for x
    x = 811,374,912,744.05/1,387,204.78
  6. Step 6: Final answer
    x = 584,899.16

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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.