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Finding the Fourth Proportional to 862,230.96, 1,189,878.96 and 499,864.88

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Solution

The fourth proportional to 862,230.96, 1,189,878.96 and 499,864.88 is: 689,813.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    862,230.96 : 1,189,878.96 = 499,864.88 : x
  2. Step 2: Convert to fraction form
    862,230.96/1,189,878.96 = 499,864.88/x
  3. Step 3: Cross multiply
    862,230.96x = 1,189,878.96 × 499,864.88
  4. Step 4: Simplify right side
    862,230.96x = 594,778,703,554.93
  5. Step 5: Solve for x
    x = 594,778,703,554.93/862,230.96
  6. Step 6: Final answer
    x = 689,813.67

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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.