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Finding the Fourth Proportional to 543,724.80, 815,587.20 and 403,756.80

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Solution

The fourth proportional to 543,724.80, 815,587.20 and 403,756.80 is: 605,635.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,724.80 : 815,587.20 = 403,756.80 : x
  2. Step 2: Convert to fraction form
    543,724.80/815,587.20 = 403,756.80/x
  3. Step 3: Cross multiply
    543,724.80x = 815,587.20 × 403,756.80
  4. Step 4: Simplify right side
    543,724.80x = 329,298,877,992.96
  5. Step 5: Solve for x
    x = 329,298,877,992.96/543,724.80
  6. Step 6: Final answer
    x = 605,635.20

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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.