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Finding the Fourth Proportional to 509,821.86, 764,285.67 and 194,068.74

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Solution

The fourth proportional to 509,821.86, 764,285.67 and 194,068.74 is: 290,932.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,821.86 : 764,285.67 = 194,068.74 : x
  2. Step 2: Convert to fraction form
    509,821.86/764,285.67 = 194,068.74/x
  3. Step 3: Cross multiply
    509,821.86x = 764,285.67 × 194,068.74
  4. Step 4: Simplify right side
    509,821.86x = 148,323,956,976.96
  5. Step 5: Solve for x
    x = 148,323,956,976.96/509,821.86
  6. Step 6: Final answer
    x = 290,932.91

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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.