Home / 685,616.40-1,028,424.60-331,322.40

Finding the Fourth Proportional to 685,616.40, 1,028,424.60 and 331,322.40

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Solution

The fourth proportional to 685,616.40, 1,028,424.60 and 331,322.40 is: 496,983.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,616.40 : 1,028,424.60 = 331,322.40 : x
  2. Step 2: Convert to fraction form
    685,616.40/1,028,424.60 = 331,322.40/x
  3. Step 3: Cross multiply
    685,616.40x = 1,028,424.60 × 331,322.40
  4. Step 4: Simplify right side
    685,616.40x = 340,740,106,691.04
  5. Step 5: Solve for x
    x = 340,740,106,691.04/685,616.40
  6. Step 6: Final answer
    x = 496,983.60

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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.