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Finding the Fourth Proportional to 398,994, 550,623.24 and 220,157.52

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Solution

The fourth proportional to 398,994, 550,623.24 and 220,157.52 is: 303,823.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,994 : 550,623.24 = 220,157.52 : x
  2. Step 2: Convert to fraction form
    398,994/550,623.24 = 220,157.52/x
  3. Step 3: Cross multiply
    398,994x = 550,623.24 × 220,157.52
  4. Step 4: Simplify right side
    398,994x = 121,223,846,972.77
  5. Step 5: Solve for x
    x = 121,223,846,972.77/398,994
  6. Step 6: Final answer
    x = 303,823.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.