Home / 838,657.80-1,257,986.70-306,196.20

Finding the Fourth Proportional to 838,657.80, 1,257,986.70 and 306,196.20

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Solution

The fourth proportional to 838,657.80, 1,257,986.70 and 306,196.20 is: 459,294.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    838,657.80 : 1,257,986.70 = 306,196.20 : x
  2. Step 2: Convert to fraction form
    838,657.80/1,257,986.70 = 306,196.20/x
  3. Step 3: Cross multiply
    838,657.80x = 1,257,986.70 × 306,196.20
  4. Step 4: Simplify right side
    838,657.80x = 385,190,747,190.54
  5. Step 5: Solve for x
    x = 385,190,747,190.54/838,657.80
  6. Step 6: Final answer
    x = 459,294.30

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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.