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Finding the Fourth Proportional to 278,650.58, 384,655.48 and 188,129.12

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Solution

The fourth proportional to 278,650.58, 384,655.48 and 188,129.12 is: 259,697.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,650.58 : 384,655.48 = 188,129.12 : x
  2. Step 2: Convert to fraction form
    278,650.58/384,655.48 = 188,129.12/x
  3. Step 3: Cross multiply
    278,650.58x = 384,655.48 × 188,129.12
  4. Step 4: Simplify right side
    278,650.58x = 72,364,896,955.58
  5. Step 5: Solve for x
    x = 72,364,896,955.58/278,650.58
  6. Step 6: Final answer
    x = 259,697.64

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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.