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Finding the Fourth Proportional to 354,688.80, 531,350.64 and 221,621.28

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Solution

The fourth proportional to 354,688.80, 531,350.64 and 221,621.28 is: 332,005.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,688.80 : 531,350.64 = 221,621.28 : x
  2. Step 2: Convert to fraction form
    354,688.80/531,350.64 = 221,621.28/x
  3. Step 3: Cross multiply
    354,688.80x = 531,350.64 × 221,621.28
  4. Step 4: Simplify right side
    354,688.80x = 117,758,608,965.62
  5. Step 5: Solve for x
    x = 117,758,608,965.62/354,688.80
  6. Step 6: Final answer
    x = 332,005.43

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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.