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Finding the Fourth Proportional to 313,915.20, 470,872.80 and 251,707.20

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Solution

The fourth proportional to 313,915.20, 470,872.80 and 251,707.20 is: 377,560.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,915.20 : 470,872.80 = 251,707.20 : x
  2. Step 2: Convert to fraction form
    313,915.20/470,872.80 = 251,707.20/x
  3. Step 3: Cross multiply
    313,915.20x = 470,872.80 × 251,707.20
  4. Step 4: Simplify right side
    313,915.20x = 118,522,074,044.16
  5. Step 5: Solve for x
    x = 118,522,074,044.16/313,915.20
  6. Step 6: Final answer
    x = 377,560.80

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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.