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Finding the Fourth Proportional to 266,706.51, 399,638.43 and 216,541.51

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Solution

The fourth proportional to 266,706.51, 399,638.43 and 216,541.51 is: 324,470.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,706.51 : 399,638.43 = 216,541.51 : x
  2. Step 2: Convert to fraction form
    266,706.51/399,638.43 = 216,541.51/x
  3. Step 3: Cross multiply
    266,706.51x = 399,638.43 × 216,541.51
  4. Step 4: Simplify right side
    266,706.51x = 86,538,310,135.81
  5. Step 5: Solve for x
    x = 86,538,310,135.81/266,706.51
  6. Step 6: Final answer
    x = 324,470.18

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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.