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Finding the Fourth Proportional to 611,291.85, 915,744.93 and 400,290.09

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Solution

The fourth proportional to 611,291.85, 915,744.93 and 400,290.09 is: 599,654.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,291.85 : 915,744.93 = 400,290.09 : x
  2. Step 2: Convert to fraction form
    611,291.85/915,744.93 = 400,290.09/x
  3. Step 3: Cross multiply
    611,291.85x = 915,744.93 × 400,290.09
  4. Step 4: Simplify right side
    611,291.85x = 366,563,620,446.74
  5. Step 5: Solve for x
    x = 366,563,620,446.74/611,291.85
  6. Step 6: Final answer
    x = 599,654.03

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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.