Home / 278,346.78-384,431.49-187,543.74

Finding the Fourth Proportional to 278,346.78, 384,431.49 and 187,543.74

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Solution

The fourth proportional to 278,346.78, 384,431.49 and 187,543.74 is: 259,021.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,346.78 : 384,431.49 = 187,543.74 : x
  2. Step 2: Convert to fraction form
    278,346.78/384,431.49 = 187,543.74/x
  3. Step 3: Cross multiply
    278,346.78x = 384,431.49 × 187,543.74
  4. Step 4: Simplify right side
    278,346.78x = 72,097,719,408.37
  5. Step 5: Solve for x
    x = 72,097,719,408.37/278,346.78
  6. Step 6: Final answer
    x = 259,021.21

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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.