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Finding the Fourth Proportional to 479,257, 661,374.66 and 267,289

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Solution

The fourth proportional to 479,257, 661,374.66 and 267,289 is: 368,858.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,257 : 661,374.66 = 267,289 : x
  2. Step 2: Convert to fraction form
    479,257/661,374.66 = 267,289/x
  3. Step 3: Cross multiply
    479,257x = 661,374.66 × 267,289
  4. Step 4: Simplify right side
    479,257x = 176,778,171,496.74
  5. Step 5: Solve for x
    x = 176,778,171,496.74/479,257
  6. Step 6: Final answer
    x = 368,858.82

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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.