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Finding the Fourth Proportional to 386,690.85, 533,513.70 and 225,431.73

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Solution

The fourth proportional to 386,690.85, 533,513.70 and 225,431.73 is: 311,026.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,690.85 : 533,513.70 = 225,431.73 : x
  2. Step 2: Convert to fraction form
    386,690.85/533,513.70 = 225,431.73/x
  3. Step 3: Cross multiply
    386,690.85x = 533,513.70 × 225,431.73
  4. Step 4: Simplify right side
    386,690.85x = 120,270,916,369.70
  5. Step 5: Solve for x
    x = 120,270,916,369.70/386,690.85
  6. Step 6: Final answer
    x = 311,026.02

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1.5x scale

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.