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Finding the Fourth Proportional to 979,975, 1,470,342.78 and 381,356.62

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Solution

The fourth proportional to 979,975, 1,470,342.78 and 381,356.62 is: 572,182.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    979,975 : 1,470,342.78 = 381,356.62 : x
  2. Step 2: Convert to fraction form
    979,975/1,470,342.78 = 381,356.62/x
  3. Step 3: Cross multiply
    979,975x = 1,470,342.78 × 381,356.62
  4. Step 4: Simplify right side
    979,975x = 560,724,952,822.20
  5. Step 5: Solve for x
    x = 560,724,952,822.20/979,975
  6. Step 6: Final answer
    x = 572,182.92

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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.