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Finding the Fourth Proportional to 425,880.54, 639,263.88 and 313,687.44

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Solution

The fourth proportional to 425,880.54, 639,263.88 and 313,687.44 is: 470,857.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,880.54 : 639,263.88 = 313,687.44 : x
  2. Step 2: Convert to fraction form
    425,880.54/639,263.88 = 313,687.44/x
  3. Step 3: Cross multiply
    425,880.54x = 639,263.88 × 313,687.44
  4. Step 4: Simplify right side
    425,880.54x = 200,529,050,001.67
  5. Step 5: Solve for x
    x = 200,529,050,001.67/425,880.54
  6. Step 6: Final answer
    x = 470,857.51

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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.