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Finding the Fourth Proportional to 509,063.20, 763,108.80 and 189,129.40

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Solution

The fourth proportional to 509,063.20, 763,108.80 and 189,129.40 is: 283,513.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,063.20 : 763,108.80 = 189,129.40 : x
  2. Step 2: Convert to fraction form
    509,063.20/763,108.80 = 189,129.40/x
  3. Step 3: Cross multiply
    509,063.20x = 763,108.80 × 189,129.40
  4. Step 4: Simplify right side
    509,063.20x = 144,326,309,478.72
  5. Step 5: Solve for x
    x = 144,326,309,478.72/509,063.20
  6. Step 6: Final answer
    x = 283,513.54

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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.