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Finding the Fourth Proportional to 318,462.95, 439,675.23 and 219,178.64

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Solution

The fourth proportional to 318,462.95, 439,675.23 and 219,178.64 is: 302,601.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,462.95 : 439,675.23 = 219,178.64 : x
  2. Step 2: Convert to fraction form
    318,462.95/439,675.23 = 219,178.64/x
  3. Step 3: Cross multiply
    318,462.95x = 439,675.23 × 219,178.64
  4. Step 4: Simplify right side
    318,462.95x = 96,367,418,953.09
  5. Step 5: Solve for x
    x = 96,367,418,953.09/318,462.95
  6. Step 6: Final answer
    x = 302,601.67

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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.