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Finding the Fourth Proportional to 401,920.61, 554,536.83 and 258,763.54

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Solution

The fourth proportional to 401,920.61, 554,536.83 and 258,763.54 is: 357,020.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,920.61 : 554,536.83 = 258,763.54 : x
  2. Step 2: Convert to fraction form
    401,920.61/554,536.83 = 258,763.54/x
  3. Step 3: Cross multiply
    401,920.61x = 554,536.83 × 258,763.54
  4. Step 4: Simplify right side
    401,920.61x = 143,493,913,191.18
  5. Step 5: Solve for x
    x = 143,493,913,191.18/401,920.61
  6. Step 6: Final answer
    x = 357,020.54

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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.