Home / 678,722.28-936,532.44-392,186.76

Finding the Fourth Proportional to 678,722.28, 936,532.44 and 392,186.76

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Solution

The fourth proportional to 678,722.28, 936,532.44 and 392,186.76 is: 541,157.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,722.28 : 936,532.44 = 392,186.76 : x
  2. Step 2: Convert to fraction form
    678,722.28/936,532.44 = 392,186.76/x
  3. Step 3: Cross multiply
    678,722.28x = 936,532.44 × 392,186.76
  4. Step 4: Simplify right side
    678,722.28x = 367,295,623,278.49
  5. Step 5: Solve for x
    x = 367,295,623,278.49/678,722.28
  6. Step 6: Final answer
    x = 541,157.46

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.