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Finding the Fourth Proportional to 413,872.20, 620,881.20 and 147,787.20

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Solution

The fourth proportional to 413,872.20, 620,881.20 and 147,787.20 is: 221,706.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,872.20 : 620,881.20 = 147,787.20 : x
  2. Step 2: Convert to fraction form
    413,872.20/620,881.20 = 147,787.20/x
  3. Step 3: Cross multiply
    413,872.20x = 620,881.20 × 147,787.20
  4. Step 4: Simplify right side
    413,872.20x = 91,758,294,080.64
  5. Step 5: Solve for x
    x = 91,758,294,080.64/413,872.20
  6. Step 6: Final answer
    x = 221,706.83

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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.