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Finding the Fourth Proportional to 393,268.70, 542,756.88 and 223,528.34

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Solution

The fourth proportional to 393,268.70, 542,756.88 and 223,528.34 is: 308,495.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,268.70 : 542,756.88 = 223,528.34 : x
  2. Step 2: Convert to fraction form
    393,268.70/542,756.88 = 223,528.34/x
  3. Step 3: Cross multiply
    393,268.70x = 542,756.88 × 223,528.34
  4. Step 4: Simplify right side
    393,268.70x = 121,321,544,409.98
  5. Step 5: Solve for x
    x = 121,321,544,409.98/393,268.70
  6. Step 6: Final answer
    x = 308,495.30

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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.