Home / 1,387,116.80-2,080,675.20-389,715.20

Finding the Fourth Proportional to 1,387,116.80, 2,080,675.20 and 389,715.20

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Solution

The fourth proportional to 1,387,116.80, 2,080,675.20 and 389,715.20 is: 584,572.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,116.80 : 2,080,675.20 = 389,715.20 : x
  2. Step 2: Convert to fraction form
    1,387,116.80/2,080,675.20 = 389,715.20/x
  3. Step 3: Cross multiply
    1,387,116.80x = 2,080,675.20 × 389,715.20
  4. Step 4: Simplify right side
    1,387,116.80x = 810,870,751,703.04
  5. Step 5: Solve for x
    x = 810,870,751,703.04/1,387,116.80
  6. Step 6: Final answer
    x = 584,572.80

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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.