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Finding the Fourth Proportional to 290,839.60, 436,264.86 and 91,155.55

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Solution

The fourth proportional to 290,839.60, 436,264.86 and 91,155.55 is: 136,735.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,839.60 : 436,264.86 = 91,155.55 : x
  2. Step 2: Convert to fraction form
    290,839.60/436,264.86 = 91,155.55/x
  3. Step 3: Cross multiply
    290,839.60x = 436,264.86 × 91,155.55
  4. Step 4: Simplify right side
    290,839.60x = 39,767,963,258.97
  5. Step 5: Solve for x
    x = 39,767,963,258.97/290,839.60
  6. Step 6: Final answer
    x = 136,735.04

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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.