Home / 543,890.40-815,835.60-343,561.20

Finding the Fourth Proportional to 543,890.40, 815,835.60 and 343,561.20

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Solution

The fourth proportional to 543,890.40, 815,835.60 and 343,561.20 is: 515,341.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,890.40 : 815,835.60 = 343,561.20 : x
  2. Step 2: Convert to fraction form
    543,890.40/815,835.60 = 343,561.20/x
  3. Step 3: Cross multiply
    543,890.40x = 815,835.60 × 343,561.20
  4. Step 4: Simplify right side
    543,890.40x = 280,289,457,738.72
  5. Step 5: Solve for x
    x = 280,289,457,738.72/543,890.40
  6. Step 6: Final answer
    x = 515,341.80

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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.