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Finding the Fourth Proportional to 717,776.28, 990,523.32 and 411,900.78

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Solution

The fourth proportional to 717,776.28, 990,523.32 and 411,900.78 is: 568,418.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,776.28 : 990,523.32 = 411,900.78 : x
  2. Step 2: Convert to fraction form
    717,776.28/990,523.32 = 411,900.78/x
  3. Step 3: Cross multiply
    717,776.28x = 990,523.32 × 411,900.78
  4. Step 4: Simplify right side
    717,776.28x = 407,997,328,116.19
  5. Step 5: Solve for x
    x = 407,997,328,116.19/717,776.28
  6. Step 6: Final answer
    x = 568,418.52

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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.