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Finding the Fourth Proportional to 1,290,604.60, 1,935,906.90 and 817,823.80

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Solution

The fourth proportional to 1,290,604.60, 1,935,906.90 and 817,823.80 is: 1,226,735.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,604.60 : 1,935,906.90 = 817,823.80 : x
  2. Step 2: Convert to fraction form
    1,290,604.60/1,935,906.90 = 817,823.80/x
  3. Step 3: Cross multiply
    1,290,604.60x = 1,935,906.90 × 817,823.80
  4. Step 4: Simplify right side
    1,290,604.60x = 1,583,230,737,404.22
  5. Step 5: Solve for x
    x = 1,583,230,737,404.22/1,290,604.60
  6. Step 6: Final answer
    x = 1,226,735.70

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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.