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Finding the Fourth Proportional to 401,321.61, 553,846.45 and 238,074.77

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Solution

The fourth proportional to 401,321.61, 553,846.45 and 238,074.77 is: 328,556.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,321.61 : 553,846.45 = 238,074.77 : x
  2. Step 2: Convert to fraction form
    401,321.61/553,846.45 = 238,074.77/x
  3. Step 3: Cross multiply
    401,321.61x = 553,846.45 × 238,074.77
  4. Step 4: Simplify right side
    401,321.61x = 131,856,866,199.07
  5. Step 5: Solve for x
    x = 131,856,866,199.07/401,321.61
  6. Step 6: Final answer
    x = 328,556.61

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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.