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Finding the Fourth Proportional to 393,371.40, 542,846.70 and 221,276.37

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Solution

The fourth proportional to 393,371.40, 542,846.70 and 221,276.37 is: 305,358.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,371.40 : 542,846.70 = 221,276.37 : x
  2. Step 2: Convert to fraction form
    393,371.40/542,846.70 = 221,276.37/x
  3. Step 3: Cross multiply
    393,371.40x = 542,846.70 × 221,276.37
  4. Step 4: Simplify right side
    393,371.40x = 120,119,147,242.48
  5. Step 5: Solve for x
    x = 120,119,147,242.48/393,371.40
  6. Step 6: Final answer
    x = 305,358.11

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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.