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Finding the Fourth Proportional to 421,717.04, 581,912.04 and 251,915.12

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Solution

The fourth proportional to 421,717.04, 581,912.04 and 251,915.12 is: 347,608.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,717.04 : 581,912.04 = 251,915.12 : x
  2. Step 2: Convert to fraction form
    421,717.04/581,912.04 = 251,915.12/x
  3. Step 3: Cross multiply
    421,717.04x = 581,912.04 × 251,915.12
  4. Step 4: Simplify right side
    421,717.04x = 146,592,441,386.05
  5. Step 5: Solve for x
    x = 146,592,441,386.05/421,717.04
  6. Step 6: Final answer
    x = 347,608.53

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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.