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Finding the Fourth Proportional to 405,411.75, 608,126.13 and 124,929

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Solution

The fourth proportional to 405,411.75, 608,126.13 and 124,929 is: 187,396.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,411.75 : 608,126.13 = 124,929 : x
  2. Step 2: Convert to fraction form
    405,411.75/608,126.13 = 124,929/x
  3. Step 3: Cross multiply
    405,411.75x = 608,126.13 × 124,929
  4. Step 4: Simplify right side
    405,411.75x = 75,972,589,294.77
  5. Step 5: Solve for x
    x = 75,972,589,294.77/405,411.75
  6. Step 6: Final answer
    x = 187,396.12

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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.