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Finding the Fourth Proportional to 422,579.40, 633,869.10 and 265,115.40

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Solution

The fourth proportional to 422,579.40, 633,869.10 and 265,115.40 is: 397,673.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,579.40 : 633,869.10 = 265,115.40 : x
  2. Step 2: Convert to fraction form
    422,579.40/633,869.10 = 265,115.40/x
  3. Step 3: Cross multiply
    422,579.40x = 633,869.10 × 265,115.40
  4. Step 4: Simplify right side
    422,579.40x = 168,048,459,994.14
  5. Step 5: Solve for x
    x = 168,048,459,994.14/422,579.40
  6. Step 6: Final answer
    x = 397,673.10

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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.