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Finding the Fourth Proportional to 217,513.80, 325,656.30 and 211,369.80

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Solution

The fourth proportional to 217,513.80, 325,656.30 and 211,369.80 is: 316,457.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,513.80 : 325,656.30 = 211,369.80 : x
  2. Step 2: Convert to fraction form
    217,513.80/325,656.30 = 211,369.80/x
  3. Step 3: Cross multiply
    217,513.80x = 325,656.30 × 211,369.80
  4. Step 4: Simplify right side
    217,513.80x = 68,833,906,999.74
  5. Step 5: Solve for x
    x = 68,833,906,999.74/217,513.80
  6. Step 6: Final answer
    x = 316,457.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.