Home / 1,387,200.75-2,080,801.13-389,928.75

Finding the Fourth Proportional to 1,387,200.75, 2,080,801.13 and 389,928.75

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Solution

The fourth proportional to 1,387,200.75, 2,080,801.13 and 389,928.75 is: 584,893.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,200.75 : 2,080,801.13 = 389,928.75 : x
  2. Step 2: Convert to fraction form
    1,387,200.75/2,080,801.13 = 389,928.75/x
  3. Step 3: Cross multiply
    1,387,200.75x = 2,080,801.13 × 389,928.75
  4. Step 4: Simplify right side
    1,387,200.75x = 811,364,181,669.84
  5. Step 5: Solve for x
    x = 811,364,181,669.84/1,387,200.75
  6. Step 6: Final answer
    x = 584,893.13

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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.