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Finding the Fourth Proportional to 393,868.46, 543,535.71 and 215,020.46

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Solution

The fourth proportional to 393,868.46, 543,535.71 and 215,020.46 is: 296,726.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,868.46 : 543,535.71 = 215,020.46 : x
  2. Step 2: Convert to fraction form
    393,868.46/543,535.71 = 215,020.46/x
  3. Step 3: Cross multiply
    393,868.46x = 543,535.71 × 215,020.46
  4. Step 4: Simplify right side
    393,868.46x = 116,871,298,390.63
  5. Step 5: Solve for x
    x = 116,871,298,390.63/393,868.46
  6. Step 6: Final answer
    x = 296,726.73

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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.