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Finding the Fourth Proportional to 666,564.96, 919,861.20 and 364,778.40

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Solution

The fourth proportional to 666,564.96, 919,861.20 and 364,778.40 is: 503,395.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,564.96 : 919,861.20 = 364,778.40 : x
  2. Step 2: Convert to fraction form
    666,564.96/919,861.20 = 364,778.40/x
  3. Step 3: Cross multiply
    666,564.96x = 919,861.20 × 364,778.40
  4. Step 4: Simplify right side
    666,564.96x = 335,545,496,758.08
  5. Step 5: Solve for x
    x = 335,545,496,758.08/666,564.96
  6. Step 6: Final answer
    x = 503,395.04

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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.