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Finding the Fourth Proportional to 215,856, 297,881.28 and 126,432

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Solution

The fourth proportional to 215,856, 297,881.28 and 126,432 is: 174,476.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,856 : 297,881.28 = 126,432 : x
  2. Step 2: Convert to fraction form
    215,856/297,881.28 = 126,432/x
  3. Step 3: Cross multiply
    215,856x = 297,881.28 × 126,432
  4. Step 4: Simplify right side
    215,856x = 37,661,725,992.96
  5. Step 5: Solve for x
    x = 37,661,725,992.96/215,856
  6. Step 6: Final answer
    x = 174,476.16

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.