Home / 685,791.60-1,028,687.40-286,299.60

Finding the Fourth Proportional to 685,791.60, 1,028,687.40 and 286,299.60

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Solution

The fourth proportional to 685,791.60, 1,028,687.40 and 286,299.60 is: 429,449.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,791.60 : 1,028,687.40 = 286,299.60 : x
  2. Step 2: Convert to fraction form
    685,791.60/1,028,687.40 = 286,299.60/x
  3. Step 3: Cross multiply
    685,791.60x = 1,028,687.40 × 286,299.60
  4. Step 4: Simplify right side
    685,791.60x = 294,512,791,145.04
  5. Step 5: Solve for x
    x = 294,512,791,145.04/685,791.60
  6. Step 6: Final answer
    x = 429,449.40

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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.