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Finding the Fourth Proportional to 398,656.28, 550,149.96 and 217,366.72

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Solution

The fourth proportional to 398,656.28, 550,149.96 and 217,366.72 is: 299,968.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,656.28 : 550,149.96 = 217,366.72 : x
  2. Step 2: Convert to fraction form
    398,656.28/550,149.96 = 217,366.72/x
  3. Step 3: Cross multiply
    398,656.28x = 550,149.96 × 217,366.72
  4. Step 4: Simplify right side
    398,656.28x = 119,584,292,313.33
  5. Step 5: Solve for x
    x = 119,584,292,313.33/398,656.28
  6. Step 6: Final answer
    x = 299,968.41

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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.