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Finding the Fourth Proportional to 290,448.53, 435,843.32 and 121,955.90

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Solution

The fourth proportional to 290,448.53, 435,843.32 and 121,955.90 is: 183,005.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,448.53 : 435,843.32 = 121,955.90 : x
  2. Step 2: Convert to fraction form
    290,448.53/435,843.32 = 121,955.90/x
  3. Step 3: Cross multiply
    290,448.53x = 435,843.32 × 121,955.90
  4. Step 4: Simplify right side
    290,448.53x = 53,153,665,744.09
  5. Step 5: Solve for x
    x = 53,153,665,744.09/290,448.53
  6. Step 6: Final answer
    x = 183,005.45

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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.