Home / 685,727.30-1,028,755.18-286,145.80

Finding the Fourth Proportional to 685,727.30, 1,028,755.18 and 286,145.80

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Solution

The fourth proportional to 685,727.30, 1,028,755.18 and 286,145.80 is: 429,287.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,727.30 : 1,028,755.18 = 286,145.80 : x
  2. Step 2: Convert to fraction form
    685,727.30/1,028,755.18 = 286,145.80/x
  3. Step 3: Cross multiply
    685,727.30x = 1,028,755.18 × 286,145.80
  4. Step 4: Simplify right side
    685,727.30x = 294,373,971,771.04
  5. Step 5: Solve for x
    x = 294,373,971,771.04/685,727.30
  6. Step 6: Final answer
    x = 429,287.23

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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.