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Finding the Fourth Proportional to 290,757.36, 436,185.18 and 91,038.36

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Solution

The fourth proportional to 290,757.36, 436,185.18 and 91,038.36 is: 136,572.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,757.36 : 436,185.18 = 91,038.36 : x
  2. Step 2: Convert to fraction form
    290,757.36/436,185.18 = 91,038.36/x
  3. Step 3: Cross multiply
    290,757.36x = 436,185.18 × 91,038.36
  4. Step 4: Simplify right side
    290,757.36x = 39,709,583,443.50
  5. Step 5: Solve for x
    x = 39,709,583,443.50/290,757.36
  6. Step 6: Final answer
    x = 136,572.93

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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.