Home / 685,759.78-1,028,736.12-286,309.70

Finding the Fourth Proportional to 685,759.78, 1,028,736.12 and 286,309.70

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Solution

The fourth proportional to 685,759.78, 1,028,736.12 and 286,309.70 is: 429,504.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,759.78 : 1,028,736.12 = 286,309.70 : x
  2. Step 2: Convert to fraction form
    685,759.78/1,028,736.12 = 286,309.70/x
  3. Step 3: Cross multiply
    685,759.78x = 1,028,736.12 × 286,309.70
  4. Step 4: Simplify right side
    685,759.78x = 294,537,129,896.36
  5. Step 5: Solve for x
    x = 294,537,129,896.36/685,759.78
  6. Step 6: Final answer
    x = 429,504.82

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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.