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Finding the Fourth Proportional to 290,833.47, 436,250.21 and 91,169.28

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Solution

The fourth proportional to 290,833.47, 436,250.21 and 91,169.28 is: 136,753.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,833.47 : 436,250.21 = 91,169.28 : x
  2. Step 2: Convert to fraction form
    290,833.47/436,250.21 = 91,169.28/x
  3. Step 3: Cross multiply
    290,833.47x = 436,250.21 × 91,169.28
  4. Step 4: Simplify right side
    290,833.47x = 39,772,617,089.70
  5. Step 5: Solve for x
    x = 39,772,617,089.70/290,833.47
  6. Step 6: Final answer
    x = 136,753.92

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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.