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Finding the Fourth Proportional to 389,814.66, 537,940.17 and 220,055.94

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Solution

The fourth proportional to 389,814.66, 537,940.17 and 220,055.94 is: 303,674.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,814.66 : 537,940.17 = 220,055.94 : x
  2. Step 2: Convert to fraction form
    389,814.66/537,940.17 = 220,055.94/x
  3. Step 3: Cross multiply
    389,814.66x = 537,940.17 × 220,055.94
  4. Step 4: Simplify right side
    389,814.66x = 118,376,929,773.11
  5. Step 5: Solve for x
    x = 118,376,929,773.11/389,814.66
  6. Step 6: Final answer
    x = 303,674.90

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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.