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Finding the Fourth Proportional to 393,400.96, 542,895.12 and 223,670.56

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Solution

The fourth proportional to 393,400.96, 542,895.12 and 223,670.56 is: 308,666.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,400.96 : 542,895.12 = 223,670.56 : x
  2. Step 2: Convert to fraction form
    393,400.96/542,895.12 = 223,670.56/x
  3. Step 3: Cross multiply
    393,400.96x = 542,895.12 × 223,670.56
  4. Step 4: Simplify right side
    393,400.96x = 121,429,655,511.67
  5. Step 5: Solve for x
    x = 121,429,655,511.67/393,400.96
  6. Step 6: Final answer
    x = 308,666.39

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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.