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Finding the Fourth Proportional to 717,767.45, 990,541.52 and 411,899.78

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Solution

The fourth proportional to 717,767.45, 990,541.52 and 411,899.78 is: 568,434.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,767.45 : 990,541.52 = 411,899.78 : x
  2. Step 2: Convert to fraction form
    717,767.45/990,541.52 = 411,899.78/x
  3. Step 3: Cross multiply
    717,767.45x = 990,541.52 × 411,899.78
  4. Step 4: Simplify right side
    717,767.45x = 408,003,834,168.87
  5. Step 5: Solve for x
    x = 408,003,834,168.87/717,767.45
  6. Step 6: Final answer
    x = 568,434.57

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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.