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Finding the Fourth Proportional to 290,985.58, 436,496.81 and 91,313.84

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Solution

The fourth proportional to 290,985.58, 436,496.81 and 91,313.84 is: 136,976.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,985.58 : 436,496.81 = 91,313.84 : x
  2. Step 2: Convert to fraction form
    290,985.58/436,496.81 = 91,313.84/x
  3. Step 3: Cross multiply
    290,985.58x = 436,496.81 × 91,313.84
  4. Step 4: Simplify right side
    290,985.58x = 39,858,199,868.85
  5. Step 5: Solve for x
    x = 39,858,199,868.85/290,985.58
  6. Step 6: Final answer
    x = 136,976.55

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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.