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Finding the Fourth Proportional to 718,485.40, 991,576.20 and 412,601.86

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Solution

The fourth proportional to 718,485.40, 991,576.20 and 412,601.86 is: 569,428.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,485.40 : 991,576.20 = 412,601.86 : x
  2. Step 2: Convert to fraction form
    718,485.40/991,576.20 = 412,601.86/x
  3. Step 3: Cross multiply
    718,485.40x = 991,576.20 × 412,601.86
  4. Step 4: Simplify right side
    718,485.40x = 409,126,184,451.73
  5. Step 5: Solve for x
    x = 409,126,184,451.73/718,485.40
  6. Step 6: Final answer
    x = 569,428.67

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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.