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Finding the Fourth Proportional to 443,340.40, 665,107.80 and 218,808.40

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Solution

The fourth proportional to 443,340.40, 665,107.80 and 218,808.40 is: 328,260.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,340.40 : 665,107.80 = 218,808.40 : x
  2. Step 2: Convert to fraction form
    443,340.40/665,107.80 = 218,808.40/x
  3. Step 3: Cross multiply
    443,340.40x = 665,107.80 × 218,808.40
  4. Step 4: Simplify right side
    443,340.40x = 145,531,173,545.52
  5. Step 5: Solve for x
    x = 145,531,173,545.52/443,340.40
  6. Step 6: Final answer
    x = 328,260.57

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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.