Home / 1,387,180.78-2,080,771.20-389,908.78

Finding the Fourth Proportional to 1,387,180.78, 2,080,771.20 and 389,908.78

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Solution

The fourth proportional to 1,387,180.78, 2,080,771.20 and 389,908.78 is: 584,863.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,180.78 : 2,080,771.20 = 389,908.78 : x
  2. Step 2: Convert to fraction form
    1,387,180.78/2,080,771.20 = 389,908.78/x
  3. Step 3: Cross multiply
    1,387,180.78x = 2,080,771.20 × 389,908.78
  4. Step 4: Simplify right side
    1,387,180.78x = 811,310,960,051.14
  5. Step 5: Solve for x
    x = 811,310,960,051.14/1,387,180.78
  6. Step 6: Final answer
    x = 584,863.18

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1.5x scale

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.