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Finding the Fourth Proportional to 296,980.92, 445,435.20 and 86,619.06

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Solution

The fourth proportional to 296,980.92, 445,435.20 and 86,619.06 is: 129,918.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,980.92 : 445,435.20 = 86,619.06 : x
  2. Step 2: Convert to fraction form
    296,980.92/445,435.20 = 86,619.06/x
  3. Step 3: Cross multiply
    296,980.92x = 445,435.20 × 86,619.06
  4. Step 4: Simplify right side
    296,980.92x = 38,583,178,314.91
  5. Step 5: Solve for x
    x = 38,583,178,314.91/296,980.92
  6. Step 6: Final answer
    x = 129,918.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.