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Finding the Fourth Proportional to 815,563.44, 1,223,346 and 310,005.60

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Solution

The fourth proportional to 815,563.44, 1,223,346 and 310,005.60 is: 465,008.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,563.44 : 1,223,346 = 310,005.60 : x
  2. Step 2: Convert to fraction form
    815,563.44/1,223,346 = 310,005.60/x
  3. Step 3: Cross multiply
    815,563.44x = 1,223,346 × 310,005.60
  4. Step 4: Simplify right side
    815,563.44x = 379,244,110,737.60
  5. Step 5: Solve for x
    x = 379,244,110,737.60/815,563.44
  6. Step 6: Final answer
    x = 465,008.72

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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.