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Finding the Fourth Proportional to 443,708.60, 666,000.30 and 219,322.40

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Solution

The fourth proportional to 443,708.60, 666,000.30 and 219,322.40 is: 329,199.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,708.60 : 666,000.30 = 219,322.40 : x
  2. Step 2: Convert to fraction form
    443,708.60/666,000.30 = 219,322.40/x
  3. Step 3: Cross multiply
    443,708.60x = 666,000.30 × 219,322.40
  4. Step 4: Simplify right side
    443,708.60x = 146,068,784,196.72
  5. Step 5: Solve for x
    x = 146,068,784,196.72/443,708.60
  6. Step 6: Final answer
    x = 329,199.80

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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.