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Finding the Fourth Proportional to 263,513.40, 394,686.90 and 216,857.40

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Solution

The fourth proportional to 263,513.40, 394,686.90 and 216,857.40 is: 324,806.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,513.40 : 394,686.90 = 216,857.40 : x
  2. Step 2: Convert to fraction form
    263,513.40/394,686.90 = 216,857.40/x
  3. Step 3: Cross multiply
    263,513.40x = 394,686.90 × 216,857.40
  4. Step 4: Simplify right side
    263,513.40x = 85,590,774,948.06
  5. Step 5: Solve for x
    x = 85,590,774,948.06/263,513.40
  6. Step 6: Final answer
    x = 324,806.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.