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Finding the Fourth Proportional to 661,706.20, 912,861.68 and 406,906.84

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Solution

The fourth proportional to 661,706.20, 912,861.68 and 406,906.84 is: 561,351.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,706.20 : 912,861.68 = 406,906.84 : x
  2. Step 2: Convert to fraction form
    661,706.20/912,861.68 = 406,906.84/x
  3. Step 3: Cross multiply
    661,706.20x = 912,861.68 × 406,906.84
  4. Step 4: Simplify right side
    661,706.20x = 371,449,661,565.89
  5. Step 5: Solve for x
    x = 371,449,661,565.89/661,706.20
  6. Step 6: Final answer
    x = 561,351.34

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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.