Home / 930,905.40-1,396,358.10-612,040.80

Finding the Fourth Proportional to 930,905.40, 1,396,358.10 and 612,040.80

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Solution

The fourth proportional to 930,905.40, 1,396,358.10 and 612,040.80 is: 918,061.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    930,905.40 : 1,396,358.10 = 612,040.80 : x
  2. Step 2: Convert to fraction form
    930,905.40/1,396,358.10 = 612,040.80/x
  3. Step 3: Cross multiply
    930,905.40x = 1,396,358.10 × 612,040.80
  4. Step 4: Simplify right side
    930,905.40x = 854,628,128,610.48
  5. Step 5: Solve for x
    x = 854,628,128,610.48/930,905.40
  6. Step 6: Final answer
    x = 918,061.20

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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.