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Finding the Fourth Proportional to 425,872.60, 637,479.96 and 313,679.50

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Solution

The fourth proportional to 425,872.60, 637,479.96 and 313,679.50 is: 469,540.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,872.60 : 637,479.96 = 313,679.50 : x
  2. Step 2: Convert to fraction form
    425,872.60/637,479.96 = 313,679.50/x
  3. Step 3: Cross multiply
    425,872.60x = 637,479.96 × 313,679.50
  4. Step 4: Simplify right side
    425,872.60x = 199,964,395,112.82
  5. Step 5: Solve for x
    x = 199,964,395,112.82/425,872.60
  6. Step 6: Final answer
    x = 469,540.41

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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.