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Finding the Fourth Proportional to 279,940,145.60, 419,910,218.40 and 260,808,269.60

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Solution

The fourth proportional to 279,940,145.60, 419,910,218.40 and 260,808,269.60 is: 391,212,404.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,940,145.60 : 419,910,218.40 = 260,808,269.60 : x
  2. Step 2: Convert to fraction form
    279,940,145.60/419,910,218.40 = 260,808,269.60/x
  3. Step 3: Cross multiply
    279,940,145.60x = 419,910,218.40 × 260,808,269.60
  4. Step 4: Simplify right side
    279,940,145.60x = 109,516,057,448,262,064
  5. Step 5: Solve for x
    x = 109,516,057,448,262,064/279,940,145.60
  6. Step 6: Final answer
    x = 391,212,404.40

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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.