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Finding the Fourth Proportional to 266,699.40, 399,985.10 and 154,136.20

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Solution

The fourth proportional to 266,699.40, 399,985.10 and 154,136.20 is: 231,167.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,699.40 : 399,985.10 = 154,136.20 : x
  2. Step 2: Convert to fraction form
    266,699.40/399,985.10 = 154,136.20/x
  3. Step 3: Cross multiply
    266,699.40x = 399,985.10 × 154,136.20
  4. Step 4: Simplify right side
    266,699.40x = 61,652,183,370.62
  5. Step 5: Solve for x
    x = 61,652,183,370.62/266,699.40
  6. Step 6: Final answer
    x = 231,167.31

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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.