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Finding the Fourth Proportional to 290,758.36, 436,186.68 and 91,039.36

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Solution

The fourth proportional to 290,758.36, 436,186.68 and 91,039.36 is: 136,574.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,758.36 : 436,186.68 = 91,039.36 : x
  2. Step 2: Convert to fraction form
    290,758.36/436,186.68 = 91,039.36/x
  3. Step 3: Cross multiply
    290,758.36x = 436,186.68 × 91,039.36
  4. Step 4: Simplify right side
    290,758.36x = 39,710,156,187.72
  5. Step 5: Solve for x
    x = 39,710,156,187.72/290,758.36
  6. Step 6: Final answer
    x = 136,574.43

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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.