Home / 1,387,470.80-2,081,206.20-390,069.20

Finding the Fourth Proportional to 1,387,470.80, 2,081,206.20 and 390,069.20

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Solution

The fourth proportional to 1,387,470.80, 2,081,206.20 and 390,069.20 is: 585,103.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,470.80 : 2,081,206.20 = 390,069.20 : x
  2. Step 2: Convert to fraction form
    1,387,470.80/2,081,206.20 = 390,069.20/x
  3. Step 3: Cross multiply
    1,387,470.80x = 2,081,206.20 × 390,069.20
  4. Step 4: Simplify right side
    1,387,470.80x = 811,814,437,469.04
  5. Step 5: Solve for x
    x = 811,814,437,469.04/1,387,470.80
  6. Step 6: Final answer
    x = 585,103.80

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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.