Home / 685,005.60-1,027,508.40-311,028.60

Finding the Fourth Proportional to 685,005.60, 1,027,508.40 and 311,028.60

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Solution

The fourth proportional to 685,005.60, 1,027,508.40 and 311,028.60 is: 466,542.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,005.60 : 1,027,508.40 = 311,028.60 : x
  2. Step 2: Convert to fraction form
    685,005.60/1,027,508.40 = 311,028.60/x
  3. Step 3: Cross multiply
    685,005.60x = 1,027,508.40 × 311,028.60
  4. Step 4: Simplify right side
    685,005.60x = 319,584,499,140.24
  5. Step 5: Solve for x
    x = 319,584,499,140.24/685,005.60
  6. Step 6: Final answer
    x = 466,542.90

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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.