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Finding the Fourth Proportional to 394,160.96, 543,941.28 and 215,312.96

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Solution

The fourth proportional to 394,160.96, 543,941.28 and 215,312.96 is: 297,131.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,160.96 : 543,941.28 = 215,312.96 : x
  2. Step 2: Convert to fraction form
    394,160.96/543,941.28 = 215,312.96/x
  3. Step 3: Cross multiply
    394,160.96x = 543,941.28 × 215,312.96
  4. Step 4: Simplify right side
    394,160.96x = 117,117,607,062.99
  5. Step 5: Solve for x
    x = 117,117,607,062.99/394,160.96
  6. Step 6: Final answer
    x = 297,131.42

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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.