Home / 685,617.40-1,028,426.10-331,323.40

Finding the Fourth Proportional to 685,617.40, 1,028,426.10 and 331,323.40

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Solution

The fourth proportional to 685,617.40, 1,028,426.10 and 331,323.40 is: 496,985.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,617.40 : 1,028,426.10 = 331,323.40 : x
  2. Step 2: Convert to fraction form
    685,617.40/1,028,426.10 = 331,323.40/x
  3. Step 3: Cross multiply
    685,617.40x = 1,028,426.10 × 331,323.40
  4. Step 4: Simplify right side
    685,617.40x = 340,741,632,100.74
  5. Step 5: Solve for x
    x = 340,741,632,100.74/685,617.40
  6. Step 6: Final answer
    x = 496,985.10

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Double scale
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Similar ratio
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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.