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Finding the Fourth Proportional to 315,153.73, 434,915.30 and 171,916.79

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Solution

The fourth proportional to 315,153.73, 434,915.30 and 171,916.79 is: 237,246.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,153.73 : 434,915.30 = 171,916.79 : x
  2. Step 2: Convert to fraction form
    315,153.73/434,915.30 = 171,916.79/x
  3. Step 3: Cross multiply
    315,153.73x = 434,915.30 × 171,916.79
  4. Step 4: Simplify right side
    315,153.73x = 74,769,241,438.30
  5. Step 5: Solve for x
    x = 74,769,241,438.30/315,153.73
  6. Step 6: Final answer
    x = 237,246.89

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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.