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Finding the Fourth Proportional to 393,372.40, 542,848.08 and 221,277.37

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Solution

The fourth proportional to 393,372.40, 542,848.08 and 221,277.37 is: 305,359.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,372.40 : 542,848.08 = 221,277.37 : x
  2. Step 2: Convert to fraction form
    393,372.40/542,848.08 = 221,277.37/x
  3. Step 3: Cross multiply
    393,372.40x = 542,848.08 × 221,277.37
  4. Step 4: Simplify right side
    393,372.40x = 120,119,995,451.95
  5. Step 5: Solve for x
    x = 120,119,995,451.95/393,372.40
  6. Step 6: Final answer
    x = 305,359.49

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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.