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Finding the Fourth Proportional to 309,481.12, 427,159.92 and 188,689.02

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Solution

The fourth proportional to 309,481.12, 427,159.92 and 188,689.02 is: 260,437.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,481.12 : 427,159.92 = 188,689.02 : x
  2. Step 2: Convert to fraction form
    309,481.12/427,159.92 = 188,689.02/x
  3. Step 3: Cross multiply
    309,481.12x = 427,159.92 × 188,689.02
  4. Step 4: Simplify right side
    309,481.12x = 80,600,386,688.08
  5. Step 5: Solve for x
    x = 80,600,386,688.08/309,481.12
  6. Step 6: Final answer
    x = 260,437.17

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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.