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Finding the Fourth Proportional to 318,699.72, 439,706.30 and 180,855.80

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Solution

The fourth proportional to 318,699.72, 439,706.30 and 180,855.80 is: 249,524.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,699.72 : 439,706.30 = 180,855.80 : x
  2. Step 2: Convert to fraction form
    318,699.72/439,706.30 = 180,855.80/x
  3. Step 3: Cross multiply
    318,699.72x = 439,706.30 × 180,855.80
  4. Step 4: Simplify right side
    318,699.72x = 79,523,434,651.54
  5. Step 5: Solve for x
    x = 79,523,434,651.54/318,699.72
  6. Step 6: Final answer
    x = 249,524.65

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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.