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Finding the Fourth Proportional to 296,755.72, 445,052.94 and 86,339.08

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Solution

The fourth proportional to 296,755.72, 445,052.94 and 86,339.08 is: 129,485.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,755.72 : 445,052.94 = 86,339.08 : x
  2. Step 2: Convert to fraction form
    296,755.72/445,052.94 = 86,339.08/x
  3. Step 3: Cross multiply
    296,755.72x = 445,052.94 × 86,339.08
  4. Step 4: Simplify right side
    296,755.72x = 38,425,461,390.90
  5. Step 5: Solve for x
    x = 38,425,461,390.90/296,755.72
  6. Step 6: Final answer
    x = 129,485.16

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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.