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Finding the Fourth Proportional to 356,630.45, 491,863.04 and 313,517.75

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Solution

The fourth proportional to 356,630.45, 491,863.04 and 313,517.75 is: 432,402.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,630.45 : 491,863.04 = 313,517.75 : x
  2. Step 2: Convert to fraction form
    356,630.45/491,863.04 = 313,517.75/x
  3. Step 3: Cross multiply
    356,630.45x = 491,863.04 × 313,517.75
  4. Step 4: Simplify right side
    356,630.45x = 154,207,793,271.03
  5. Step 5: Solve for x
    x = 154,207,793,271.03/356,630.45
  6. Step 6: Final answer
    x = 432,402.21

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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.