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Finding the Fourth Proportional to 245,207.80, 367,811.70 and 215,683.30

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Solution

The fourth proportional to 245,207.80, 367,811.70 and 215,683.30 is: 323,524.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,207.80 : 367,811.70 = 215,683.30 : x
  2. Step 2: Convert to fraction form
    245,207.80/367,811.70 = 215,683.30/x
  3. Step 3: Cross multiply
    245,207.80x = 367,811.70 × 215,683.30
  4. Step 4: Simplify right side
    245,207.80x = 79,330,841,234.61
  5. Step 5: Solve for x
    x = 79,330,841,234.61/245,207.80
  6. Step 6: Final answer
    x = 323,524.95

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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.