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Finding the Fourth Proportional to 407,953.80, 611,930.70 and 405,001.35

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Solution

The fourth proportional to 407,953.80, 611,930.70 and 405,001.35 is: 607,502.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,953.80 : 611,930.70 = 405,001.35 : x
  2. Step 2: Convert to fraction form
    407,953.80/611,930.70 = 405,001.35/x
  3. Step 3: Cross multiply
    407,953.80x = 611,930.70 × 405,001.35
  4. Step 4: Simplify right side
    407,953.80x = 247,832,759,606.45
  5. Step 5: Solve for x
    x = 247,832,759,606.45/407,953.80
  6. Step 6: Final answer
    x = 607,502.03

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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.