Home / 278,781.42-384,719.86-171,421.60

Finding the Fourth Proportional to 278,781.42, 384,719.86 and 171,421.60

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Solution

The fourth proportional to 278,781.42, 384,719.86 and 171,421.60 is: 236,562.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,781.42 : 384,719.86 = 171,421.60 : x
  2. Step 2: Convert to fraction form
    278,781.42/384,719.86 = 171,421.60/x
  3. Step 3: Cross multiply
    278,781.42x = 384,719.86 × 171,421.60
  4. Step 4: Simplify right side
    278,781.42x = 65,949,293,952.98
  5. Step 5: Solve for x
    x = 65,949,293,952.98/278,781.42
  6. Step 6: Final answer
    x = 236,562.73

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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.