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Finding the Fourth Proportional to 398,661.32, 550,156.82 and 217,371.72

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Solution

The fourth proportional to 398,661.32, 550,156.82 and 217,371.72 is: 299,975.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,661.32 : 550,156.82 = 217,371.72 : x
  2. Step 2: Convert to fraction form
    398,661.32/550,156.82 = 217,371.72/x
  3. Step 3: Cross multiply
    398,661.32x = 550,156.82 × 217,371.72
  4. Step 4: Simplify right side
    398,661.32x = 119,588,534,233.13
  5. Step 5: Solve for x
    x = 119,588,534,233.13/398,661.32
  6. Step 6: Final answer
    x = 299,975.26

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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.