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Finding the Fourth Proportional to 863,807.40, 1,295,711.10 and 443,903.40

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Solution

The fourth proportional to 863,807.40, 1,295,711.10 and 443,903.40 is: 665,855.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    863,807.40 : 1,295,711.10 = 443,903.40 : x
  2. Step 2: Convert to fraction form
    863,807.40/1,295,711.10 = 443,903.40/x
  3. Step 3: Cross multiply
    863,807.40x = 1,295,711.10 × 443,903.40
  4. Step 4: Simplify right side
    863,807.40x = 575,170,562,707.74
  5. Step 5: Solve for x
    x = 575,170,562,707.74/863,807.40
  6. Step 6: Final answer
    x = 665,855.10

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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.