Home / 689,108.40-1,033,662.60-215,938.80

Finding the Fourth Proportional to 689,108.40, 1,033,662.60 and 215,938.80

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Solution

The fourth proportional to 689,108.40, 1,033,662.60 and 215,938.80 is: 323,908.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,108.40 : 1,033,662.60 = 215,938.80 : x
  2. Step 2: Convert to fraction form
    689,108.40/1,033,662.60 = 215,938.80/x
  3. Step 3: Cross multiply
    689,108.40x = 1,033,662.60 × 215,938.80
  4. Step 4: Simplify right side
    689,108.40x = 223,207,861,448.88
  5. Step 5: Solve for x
    x = 223,207,861,448.88/689,108.40
  6. Step 6: Final answer
    x = 323,908.20

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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.