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Finding the Fourth Proportional to 411,689.01, 617,379.94 and 141,740.90

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Solution

The fourth proportional to 411,689.01, 617,379.94 and 141,740.90 is: 212,558.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,689.01 : 617,379.94 = 141,740.90 : x
  2. Step 2: Convert to fraction form
    411,689.01/617,379.94 = 141,740.90/x
  3. Step 3: Cross multiply
    411,689.01x = 617,379.94 × 141,740.90
  4. Step 4: Simplify right side
    411,689.01x = 87,507,988,337.55
  5. Step 5: Solve for x
    x = 87,507,988,337.55/411,689.01
  6. Step 6: Final answer
    x = 212,558.48

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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.