Home / 1,387,200.30-2,080,800.45-389,798.70

Finding the Fourth Proportional to 1,387,200.30, 2,080,800.45 and 389,798.70

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Solution

The fourth proportional to 1,387,200.30, 2,080,800.45 and 389,798.70 is: 584,698.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,200.30 : 2,080,800.45 = 389,798.70 : x
  2. Step 2: Convert to fraction form
    1,387,200.30/2,080,800.45 = 389,798.70/x
  3. Step 3: Cross multiply
    1,387,200.30x = 2,080,800.45 × 389,798.70
  4. Step 4: Simplify right side
    1,387,200.30x = 811,093,310,369.42
  5. Step 5: Solve for x
    x = 811,093,310,369.42/1,387,200.30
  6. Step 6: Final answer
    x = 584,698.05

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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.