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Finding the Fourth Proportional to 405,810.12, 608,791.72 and 125,261.76

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Solution

The fourth proportional to 405,810.12, 608,791.72 and 125,261.76 is: 187,916.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,810.12 : 608,791.72 = 125,261.76 : x
  2. Step 2: Convert to fraction form
    405,810.12/608,791.72 = 125,261.76/x
  3. Step 3: Cross multiply
    405,810.12x = 608,791.72 × 125,261.76
  4. Step 4: Simplify right side
    405,810.12x = 76,258,322,320.63
  5. Step 5: Solve for x
    x = 76,258,322,320.63/405,810.12
  6. Step 6: Final answer
    x = 187,916.27

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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.