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Finding the Fourth Proportional to 393,637.52, 543,263.49 and 221,560.72

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Solution

The fourth proportional to 393,637.52, 543,263.49 and 221,560.72 is: 305,778.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,637.52 : 543,263.49 = 221,560.72 : x
  2. Step 2: Convert to fraction form
    393,637.52/543,263.49 = 221,560.72/x
  3. Step 3: Cross multiply
    393,637.52x = 543,263.49 × 221,560.72
  4. Step 4: Simplify right side
    393,637.52x = 120,365,848,635.95
  5. Step 5: Solve for x
    x = 120,365,848,635.95/393,637.52
  6. Step 6: Final answer
    x = 305,778.39

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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.