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Finding the Fourth Proportional to 362,431.80, 543,129.30 and 266,916.60

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Solution

The fourth proportional to 362,431.80, 543,129.30 and 266,916.60 is: 399,993.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    362,431.80 : 543,129.30 = 266,916.60 : x
  2. Step 2: Convert to fraction form
    362,431.80/543,129.30 = 266,916.60/x
  3. Step 3: Cross multiply
    362,431.80x = 543,129.30 × 266,916.60
  4. Step 4: Simplify right side
    362,431.80x = 144,970,226,116.38
  5. Step 5: Solve for x
    x = 144,970,226,116.38/362,431.80
  6. Step 6: Final answer
    x = 399,993.12

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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.