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Finding the Fourth Proportional to 398,995, 550,624.62 and 220,158.52

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Solution

The fourth proportional to 398,995, 550,624.62 and 220,158.52 is: 303,825.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,995 : 550,624.62 = 220,158.52 : x
  2. Step 2: Convert to fraction form
    398,995/550,624.62 = 220,158.52/x
  3. Step 3: Cross multiply
    398,995x = 550,624.62 × 220,158.52
  4. Step 4: Simplify right side
    398,995x = 121,224,701,414.76
  5. Step 5: Solve for x
    x = 121,224,701,414.76/398,995
  6. Step 6: Final answer
    x = 303,825.11

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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.