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Finding the Fourth Proportional to 478,558.09, 660,439.16 and 263,697.89

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Solution

The fourth proportional to 478,558.09, 660,439.16 and 263,697.89 is: 363,919.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,558.09 : 660,439.16 = 263,697.89 : x
  2. Step 2: Convert to fraction form
    478,558.09/660,439.16 = 263,697.89/x
  3. Step 3: Cross multiply
    478,558.09x = 660,439.16 × 263,697.89
  4. Step 4: Simplify right side
    478,558.09x = 174,156,412,965.37
  5. Step 5: Solve for x
    x = 174,156,412,965.37/478,558.09
  6. Step 6: Final answer
    x = 363,919.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.