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Finding the Fourth Proportional to 874,965.20, 1,309,823.40 and 823,060.40

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Solution

The fourth proportional to 874,965.20, 1,309,823.40 and 823,060.40 is: 1,232,121.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,965.20 : 1,309,823.40 = 823,060.40 : x
  2. Step 2: Convert to fraction form
    874,965.20/1,309,823.40 = 823,060.40/x
  3. Step 3: Cross multiply
    874,965.20x = 1,309,823.40 × 823,060.40
  4. Step 4: Simplify right side
    874,965.20x = 1,078,063,771,533.36
  5. Step 5: Solve for x
    x = 1,078,063,771,533.36/874,965.20
  6. Step 6: Final answer
    x = 1,232,121.88

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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.