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Finding the Fourth Proportional to 612,989.16, 919,474.50 and 275,791.68

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Solution

The fourth proportional to 612,989.16, 919,474.50 and 275,791.68 is: 413,683.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,989.16 : 919,474.50 = 275,791.68 : x
  2. Step 2: Convert to fraction form
    612,989.16/919,474.50 = 275,791.68/x
  3. Step 3: Cross multiply
    612,989.16x = 919,474.50 × 275,791.68
  4. Step 4: Simplify right side
    612,989.16x = 253,583,417,072.16
  5. Step 5: Solve for x
    x = 253,583,417,072.16/612,989.16
  6. Step 6: Final answer
    x = 413,683.36

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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.