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Finding the Fourth Proportional to 405,426.10, 607,935.15 and 124,906.90

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Solution

The fourth proportional to 405,426.10, 607,935.15 and 124,906.90 is: 187,297.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,426.10 : 607,935.15 = 124,906.90 : x
  2. Step 2: Convert to fraction form
    405,426.10/607,935.15 = 124,906.90/x
  3. Step 3: Cross multiply
    405,426.10x = 607,935.15 × 124,906.90
  4. Step 4: Simplify right side
    405,426.10x = 75,935,294,987.54
  5. Step 5: Solve for x
    x = 75,935,294,987.54/405,426.10
  6. Step 6: Final answer
    x = 187,297.50

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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.