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Finding the Fourth Proportional to 308,737.70, 426,077.79 and 172,787.30

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Solution

The fourth proportional to 308,737.70, 426,077.79 and 172,787.30 is: 238,457.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,737.70 : 426,077.79 = 172,787.30 : x
  2. Step 2: Convert to fraction form
    308,737.70/426,077.79 = 172,787.30/x
  3. Step 3: Cross multiply
    308,737.70x = 426,077.79 × 172,787.30
  4. Step 4: Simplify right side
    308,737.70x = 73,620,830,924.07
  5. Step 5: Solve for x
    x = 73,620,830,924.07/308,737.70
  6. Step 6: Final answer
    x = 238,457.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.