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Finding the Fourth Proportional to 385,790.80, 579,059.70 and 186,251.20

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Solution

The fourth proportional to 385,790.80, 579,059.70 and 186,251.20 is: 279,557.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,790.80 : 579,059.70 = 186,251.20 : x
  2. Step 2: Convert to fraction form
    385,790.80/579,059.70 = 186,251.20/x
  3. Step 3: Cross multiply
    385,790.80x = 579,059.70 × 186,251.20
  4. Step 4: Simplify right side
    385,790.80x = 107,850,563,996.64
  5. Step 5: Solve for x
    x = 107,850,563,996.64/385,790.80
  6. Step 6: Final answer
    x = 279,557.12

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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.