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Finding the Fourth Proportional to 393,396.96, 542,889.60 and 223,666.56

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Solution

The fourth proportional to 393,396.96, 542,889.60 and 223,666.56 is: 308,660.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,396.96 : 542,889.60 = 223,666.56 : x
  2. Step 2: Convert to fraction form
    393,396.96/542,889.60 = 223,666.56/x
  3. Step 3: Cross multiply
    393,396.96x = 542,889.60 × 223,666.56
  4. Step 4: Simplify right side
    393,396.96x = 121,426,249,291.78
  5. Step 5: Solve for x
    x = 121,426,249,291.78/393,396.96
  6. Step 6: Final answer
    x = 308,660.87

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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.