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Finding the Fourth Proportional to 318,499.85, 439,711.08 and 211,214.72

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Solution

The fourth proportional to 318,499.85, 439,711.08 and 211,214.72 is: 291,596.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,499.85 : 439,711.08 = 211,214.72 : x
  2. Step 2: Convert to fraction form
    318,499.85/439,711.08 = 211,214.72/x
  3. Step 3: Cross multiply
    318,499.85x = 439,711.08 × 211,214.72
  4. Step 4: Simplify right side
    318,499.85x = 92,873,452,643.10
  5. Step 5: Solve for x
    x = 92,873,452,643.10/318,499.85
  6. Step 6: Final answer
    x = 291,596.53

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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.