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Finding the Fourth Proportional to 443,985.30, 665,540.55 and 219,380.40

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Solution

The fourth proportional to 443,985.30, 665,540.55 and 219,380.40 is: 328,854.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,985.30 : 665,540.55 = 219,380.40 : x
  2. Step 2: Convert to fraction form
    443,985.30/665,540.55 = 219,380.40/x
  3. Step 3: Cross multiply
    443,985.30x = 665,540.55 × 219,380.40
  4. Step 4: Simplify right side
    443,985.30x = 146,006,552,075.22
  5. Step 5: Solve for x
    x = 146,006,552,075.22/443,985.30
  6. Step 6: Final answer
    x = 328,854.47

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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.