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Finding the Fourth Proportional to 266,721.78, 400,395.23 and 210,599.72

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Solution

The fourth proportional to 266,721.78, 400,395.23 and 210,599.72 is: 316,146.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,721.78 : 400,395.23 = 210,599.72 : x
  2. Step 2: Convert to fraction form
    266,721.78/400,395.23 = 210,599.72/x
  3. Step 3: Cross multiply
    266,721.78x = 400,395.23 × 210,599.72
  4. Step 4: Simplify right side
    266,721.78x = 84,323,123,327.34
  5. Step 5: Solve for x
    x = 84,323,123,327.34/266,721.78
  6. Step 6: Final answer
    x = 316,146.37

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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.