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Finding the Fourth Proportional to 318,808.99, 439,972.70 and 180,997.58

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Solution

The fourth proportional to 318,808.99, 439,972.70 and 180,997.58 is: 249,785.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,808.99 : 439,972.70 = 180,997.58 : x
  2. Step 2: Convert to fraction form
    318,808.99/439,972.70 = 180,997.58/x
  3. Step 3: Cross multiply
    318,808.99x = 439,972.70 × 180,997.58
  4. Step 4: Simplify right side
    318,808.99x = 79,633,993,189.85
  5. Step 5: Solve for x
    x = 79,633,993,189.85/318,808.99
  6. Step 6: Final answer
    x = 249,785.91

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1.5x scale

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.