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Finding the Fourth Proportional to 661,353.66, 990,347.72 and 436,030.49

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Solution

The fourth proportional to 661,353.66, 990,347.72 and 436,030.49 is: 652,936.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,353.66 : 990,347.72 = 436,030.49 : x
  2. Step 2: Convert to fraction form
    661,353.66/990,347.72 = 436,030.49/x
  3. Step 3: Cross multiply
    661,353.66x = 990,347.72 × 436,030.49
  4. Step 4: Simplify right side
    661,353.66x = 431,821,801,917.70
  5. Step 5: Solve for x
    x = 431,821,801,917.70/661,353.66
  6. Step 6: Final answer
    x = 652,936.29

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Double scale
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Similar ratio
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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.