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Finding the Fourth Proportional to 443,611.20, 665,416.80 and 163,070.40

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Solution

The fourth proportional to 443,611.20, 665,416.80 and 163,070.40 is: 244,605.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,611.20 : 665,416.80 = 163,070.40 : x
  2. Step 2: Convert to fraction form
    443,611.20/665,416.80 = 163,070.40/x
  3. Step 3: Cross multiply
    443,611.20x = 665,416.80 × 163,070.40
  4. Step 4: Simplify right side
    443,611.20x = 108,509,783,742.72
  5. Step 5: Solve for x
    x = 108,509,783,742.72/443,611.20
  6. Step 6: Final answer
    x = 244,605.60

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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.