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Finding the Fourth Proportional to 320,858.70, 441,630.27 and 302,487.90

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Solution

The fourth proportional to 320,858.70, 441,630.27 and 302,487.90 is: 416,344.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,858.70 : 441,630.27 = 302,487.90 : x
  2. Step 2: Convert to fraction form
    320,858.70/441,630.27 = 302,487.90/x
  3. Step 3: Cross multiply
    320,858.70x = 441,630.27 × 302,487.90
  4. Step 4: Simplify right side
    320,858.70x = 133,587,812,948.73
  5. Step 5: Solve for x
    x = 133,587,812,948.73/320,858.70
  6. Step 6: Final answer
    x = 416,344.68

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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.